If you are driving from Nairobi to any camp, have a slow motion video ready, the sights will be unbelievable. We saw a motorcycle with a couch attached and a passenger sitting on it. Caskets (with bodies) on top of the car heading for the village for funeral services on Fridays. Amazing. I could tell you so many things, but mainly that the trip will be spectacular - we have traveled all over and this tops for so many reasons. By the way, we saw a Natgeo vehicle in the Masai Mara - oh yeah, huge remote control camera on the front of the vehicle and a sign asking you not to follow the car. Way out of a regular person's league. So no Natgeo pictures, but some impressive and cool ones never the less. We saw lions, cheetahs stalking, a leopard in a tree consuming a gazelle, a lion eating a zebra, giraffe, buzzards consuming zebra, in addition to thousands animals making their way. SPECTACULAR

I just got back from a trip to S. Africa and Namibia. A bit different situation in that (I think) animals in Kenya are in a more open environment, thus more movement. Right now, it is summer. That means that the bulk of the animals will be looking for water at watering holes rather than puddles...thus it is easier to get photos of them. (Again...different parts of the continent..so take that into account.) I absolutely positively recommend that you take two bodies. It can get very very dusty quickly. No way of changing lenses in the back of a safari vehicle. I had two micro 4/3 bodies...one with a 12-100 Pro Oly and the other with a 100-400 Leica Panasonic. I used the 12-100 most of the time, but did need the reach on a few occasions. The combo was perfect. (This will also be determined by where you go and if your guide can drive off the roads..in some instances we were allowed to and in others, we were not.) I recommend the 24-104 and the 100-400. Also, as mentioned, some people take a Sony bridge camera. I would think this would work well too. Maybe next time for me.

Also, I set up a pre-determined custom setting so that if there were action type shots, I could press a button and put my camera into a shutter priority- auto ISO- focus tracking - high speed mode. I used it once at a cheetah run. Usually I was either manual or A priority.

Animals get active at night...but often, game drives are not allowed at night. When the sun starts setting, you will quickly find that it gets dark and the limits of your camera will be tested. (As I said, mine was an M4/3 so I had more limitations than you.) You really have to bump up the ISO to get any kind of shots.

People think they are going to go to Africa and get Nat Geo pics...it may happen, but for the most part the photos will be memorable, but not Nat Geo quality. To do that you have to spend many many hours / days watching / tracking animals. You might get lucky to see a predator / prey chase or something, but don't count on it.

Take a pocket rocket, several lens pens, micro cloths and cleaning solution to deal with the dust. I had to clean my cameras, almost like guns, at the end of the day. On one game drive in the desert, they were covered in white powdery dust.

There are people in Africa! Interesting, wonderful people! I prefer people photography to animal photography any day of the week...including Africa. Do what you can to do some cultural adventures...meet the people. You wont be sorry.

Finally, once in a while, just put the camera down and enjoy the experience. The animals, etc...constantly looking through a view finder is no way to experience the place. Enjoy.

You will find your trip amazing and most likely exceeding all of your expectations.

My experience in Tanzania in April 2019 was that the more 'reach' the better. I shoot with Olympus OMD EM1 MK II bodies, so there is a 2x crop factor with lenses. On one body, I used the Panasonic 100-400 and probably shot 95+% of 12,500 images with this lens. On my second body I had an Olympus 12-100 f4 lens. I have not done a search but would not be surprised that a majority of my shots were at 600 mm or equivalent. So again, the more reach the better.

You do want two bodies, first because of dust, and secondly because things can happen quickly and you might need the wider view angle as animals move closer to your vehicle.

Have a great time on your trip.

Long lens is the main issue in the bush, longer the better. 400mm is great. I’m not one for lens extender as quality drops and you can do just as well blowing up the original. I have had occasional situation of lions being too close — like circling Jeep/or friends having cheetah jumping on jeep — not too frequent but not rare either. My recommendation is always just to chase cats ! You will see all the other stuff, but cats offer the most drama — they are the ones that hunt. We would sit on some sleeping cats for an hour or more waiting. Prowling cats are incredible. Absolutely essential to be in open top Jeep, NOT open side. I recommend 3 people max per Jeep, so you can move easily. Keep windows in Jeep open and somehow find a way to constantly tell yourself to get on knees and shoot thru windows, so you get a low angle — so easy to forget in the midst of action, but you get some very nice shots down low. Very important to talk with guide ahead of time and be sure he/she understands you need to be in charge. Stop when you want — Go at speed you want. I would watch speedometer and usually tell guide “29kms/he here or 40 at another place. It should be a working relationship btwn the two of you — and never hesitate to say “let’s go back, I missed a shot.” I’ve never been keen on a night drive. One thing you can do is have your box lunch at your side and nibble along the way — they always give you too much. Don’t go back to lodge for lunch or stop to eat. Just keep on move sunrise-sunset. If space/equip an issue, get new iPhone and use that for “other” shots. I use for videos, esp close ups. Recently blew up a pano of NYC from Rock Cntr to 20X60in — the detail was mind blowing. Plus it has most all the major adjustments as Photoshop. And will do you great at night. If you have choices, Masai Mara is the best in Kenya and you could spend all your days there. One thing in Kenya, they don’t always respect the animals and move in too close, can become a mass riot of jeeps. I was there last Jan and got lucky to see migration/water crossing — literally thousands of wildebeests. Totally crazy. If you are carrying camera in town and have a pop screen, it is always nice to shoot people from the hip — rather than camera up to your eye. Also in markets get contact info and send people photos — they love it. Strongly consider a donation and maybe go see Najin and Fatu, last two remaining Norther White Rhino

https://www.olpejetaconservancy.org/wildlife/rhinos/northern-white-rhinos/

My experience in Kenya was excellent. What have you been told by the tour operator? They are the best source as they know exactly how the tour will be conducted. I was in the Masi Mara for ten days. We did a drive in the morning and one again mid-afternoon. Most of the “shooting” was done from a vehicle. There really was not a lot of “walking around.” We did get out on occasion, but not often near any animals. We also visited a village one day.
You need reach and a faster lens. The 70-200 is a good choice and your 600 will certainly give you reach. Pick one of the other lens that you like for a bit of wide angle.
Changing lenses can be a challenge with the dust. Two bodies will be a big plus.
I used bean bags to rest the cameras on in most circumstances when shooting from the vehicle. Each photographer had an entire row and could move from side to side with no obstruction. I kept a bean bag on each side.

Again, talk to your tour operator about conditions and shooting expectations.

As others have said, ENJOY! Take time to just fell the beauty of the space and the animals.

One thing I need not realize was the number of birds in Africa. Your long lens will be a great addition.

PM me if you have any specific questions.

I don't have one, the the Nikon P1000 has amazing zoom - checked it out at camera store. And should have better low light capability than the 900. I'd love to know from an actual user. I think it is supposed to be good for birds also, and plenty of birds in Africa. My husband has some great shots with a Sony cybershot point and shoot. And yes, you can be amazingly close to any of the animals, even leopards or lions. Animals pay no attention to the vehicles.
We were limited to 33 pound duffle bag for traveling Kenya and Tanzania by land cruiser. And count on very dusty environment. The parks do not have paved roads.

I used ziplocks on African and other trips, and they certainly help when there’s dust, sea spray, and similar problems. I always carry a transparent as well. However I’ve never had a problem with dust - there always seems to be a place available where lens changes are possible.

I notice that several people have recommended the Sony Rx10 MkIV because of the range and dedicated lens. The camera has been highly recommended on other posts also. However my experience with it was less than satisfactory due to excessive noise at high ISO settings, and a question about defective lens coatings causing erratic blurry color spots on some shots. Perhaps I have a lemon, but I no longer trust that camera.

I've been to various countries in Africa half a dozen times, and since I use cropped Nikons, I take two bodies: one with an 18-300 and the other with a 150-600 zoom. Make sure the operator can supply you with bean bags, and just about all guides have experience with photography to put you in the right position and can anticipate any animal movement. I pack several large zip lock bags to keep the cameras out of the dust when moving, and can actually change lenses inside the bags if necessary. My wife uses full-frame Nikons and takes a 500 mm fixed and her 80-400, and will occasionally use an extender, especially for a river crossing because you can't get close to the river as it is usually a traffic jam. And my images are clear, even if they are zoom lenses. We have had animals walk under the bumpers of our vehicles and even have had cheetahs sit on top of an vehicles parked close to us.