My camera bag includes (as at Nov 2018):
Nikon D850 body,
Nikon 500mm F/4, FL ED VR
Nikon 1.4x Mk3 Teleconverter,
Nikon 200mm F/4 Micro Nikkor
Nikon 105mm F/2.8 Micro Nikkor (macro) earlier Japanese made model.
Manfrotto carbon fibre tripod with Jobu J3K gimbal (mark2).
Zeiss 8x42 SF
On the lookout for: currently very satisfied (Nov 2018) but would certainly consider a Nikon 800mm F/5.6
In hiking mode, the kit is carried on a Scopac. Circular polariser and neutral density (ND2) filters are also used when conditions demand them. I carry about 200 gigs of memory on several separate cards. I generally shoot in RAW. For slower moving subjects, I switch to 14 bit which adds about 10% to the file size. Lightroom CC is used to process the images. I also use Adobe Light Room.
If space and weight allows on foreign trips, I take my laptop (Surface Pro 4) and download all images each evening.