I'm going to suggest a different path. Granted, the D7200 is a fine camera. I know because I use one. But you mentioned you had a number of older MF glass. I don't know what price you are seeing on the Costco deal but to get the best of two worlds, consider the D750. If your old Nikkors are AI (built since 1977) or newer, they will mate up with the D750 just fine. The 750 shoots both FX and DX with full control over all D, I, S or G lens. The old glass will give you full color matrix metering, aperture priority auto exposure and full EXIF data. The crop sensor will cut you to about 10 megapixels on DX glass but use full FX on the old glass. Just a thought.

MPB seems to be an excellent source of used photographic equipment. I bought a lens from them last month. It took about three weeks to receive, but was well packed, and was in great shape, just as the quality ratings predicted. They operate just like KEH. I have had great success with KEH as well. Sometimes they have what I'm looking for when KEH does not. I don't see any difference between the two except one is in Great Britain and the other in America.

After reading the NOTAM, and assuming this restriction goes viral and every airline is forced to comply, I suggest getting a Pelican case, lock with a TSA approved roller lock, and insuring the kit for loss or damage. I have carried full suitcase loads of camera gear to Africa and had no trouble.

On a recent trip to Alaska to see the Fur Rondy and the Iditarod, I took along my trusty old Nikon D40 and the kit lens. I also was trying out my new Lumix G7 with the kit 14-42. In temperatures, at times, well below zero, both performed very well. I really fell in love with the Lumix as it allowed me to switch quickly between stills and video. Both these cameras are very light and take outstanding pictures. While spending a week in a cabin up on Trapper Creek, I was out most nights shooting the Northern Lights. Because I had my D40, it will take any Nikon lens including old non AI. A neighbor loaned me his 24mm f2.8 and it worked perfect for the long exposures of the Northern Lights. I think the Lumix will be my travel camera for a long time. Even with a lot of lens, it still is light and packs in a very small backpack. Even with a 4/3 sensor, I was very impressed with the quality of the prints up to 8x10. I also used my iPhone 6 S Plus to send daily video posts of the action but was disappointed by the battery performance being so poor. The extreme cold really drains the battery. Something I did not anticipate.

When I was just a teen, I borrowed the "family camera", a Brownie Box 616. Loved the sharp contact prints made with that camera. But I always wanted to move to a 35mm format because of the wide choice of film stock I could choose from. My dream camera in high school was a Kodak Retina III, but never had the money to buy one. After I joined the Air Force, I was assigned to Okinawa and the BX carried a wide variety of great 35mm cameras at very good prices. Became familiar with the Nikon brand and ended up buying a Nikon FTn with a 50mm, f1.4 lens. Before long I had saved enough money to get a good variety of lens including a 35mm, f2.8, 135mm, f3.5, 200mm, f4. Later, I bought another F body so I could carry two lens mounted. Very helpful as I explored the island of Okinawa and later England, the rest of Europe and Alaska. Many years later, I added a used 85mm, f1.8. Now retired, I still shoot some film, but usually just scan to digital afterwards. I picked up a Canon EOS-1n with a 20-35mm f3.5 lens about five years ago and have used it to good effect at sites like Sky City, NM where I had to work hard to get tourist out of the picture and still capture the buildings. I probably would use other brands but when you have invested a lot of money in lens, it is hard to transition to another brand. So, when I first started in digital, I went with a Nikon D40 because I could use my older manual focus Nikon lens that were sharper and faster than the kit lens Nikon was making for the D40. I admit I'm getting lazy in my old age as now I prefer auto focus. It lets me concentrate on other factors more even though I still override quite a bit. Just getting used to my new Nikon D7200. I think I like it so far. Just bought the ultra wide 10-24mm for a trip up north to shoot the Fur Rendezvous and the start of the Iditarod dog sled races in Anchorage. I guess I'm stuck with Nikon. Not that it isn't a good place to get stuck!