I downloaded Picassa from here: https://picasa.en.softonic.com/download & it's running on Windows 10

Go for it. Our D90 is still going strong & my wife loves it.

Thanks, Graham. Does this 'school photo' count?

We've done 5 African safaris & 3 Indian ones. Take your 300. If you can rent a 150-600 take that (+ your 18-200 for back up - changing lenses is not as horrific as suggested).

Many of us know the Major General's song from PIrates of Penzanze: https://www.youtube.com/watch?v=Rs3dPaz9nAo

You may also enjoy this modern "take": https://www.youtube.com/watch?v=k-LTRwZb35A&feature=youtu.be

I have Nikon D7100 with various lenses, I've just bought Sony RX10iii second hand from Ebay. I love it for its portability.

You might find my post on page 2 of this thread to be helpful: https://www.uglyhedgehog.com/t-543000-2.html

A brilliant set. Well done!

You might find my post on page 2 of this thread helpful: https://www.uglyhedgehog.com/t-543000-2.html

This is obviously not a new experience. My wife's book sold (it's now out of print but available on CD/download) was £11.99: https://www.amazon.co.uk/gp/offer-listing/0955345014/ref=sr_1_1_olp?ie=UTF8&qid=1536507627&sr=8-1&keywords=pitfalls+and+possibilities+in+family+history+research

We've been to India six times in Nov/Dec/Jan & have never encountered fog/haze

No - it's DX

Two bodies (& the idea of buying a used one rather than renting sounds worth considering). We went to Antarctica in 2004 with film cameras. I had a pocket camera & wife had a Nikon DSLR. One morning I found my pocket camera had inexplicably died. Murphy being firmly in charge, when we arrived onshore my wife found her Nikon wouldn't focus. One of the expedition crew was also shooting Nikon so he lent us his body so we could establish whether it was her camera body or lens playing up. It was the body (when we got back to Uk it turned out that the shutter curtain [a film camera, remember] was twisted). We were therefore without either camera until the expedition crew member said "do borrow my spare Nikon body" (there are some nice people around!) which she used for the rest of the trip. Take two bodies!

I don't have a roller case. Instead I use Lowepro backpack which fits nicely into a cabin bag; we then tend to leave the cabin bag with the tour company on arrival to pick up again on departure & use the backpack on safari (particularly useful if you're flying by small plane between parks as small plane sprefer soft baggage).

Did I mention - take two bodies?!

Off topic - you may be able to get a ticket for your visit from http://cadw.gov.wales/daysout/maps-and-itineraries/?lang=en rather than pay for each castle.

Free travel from the UK...! Where do I sign?