I think my walk about camera combo is going to be two Canon P’s one with 35mm lens and one with 50mm lens. With a 100mm in bag. With a small GE selenium light meter hand held.
For family grab shots, I think a Canon QL-17 GIII with small flash. Minolta IV f flash meter.
Why not get the Canonlite D flash instead of carrying a seperate meter for this?
For macro details shots I think a Nikon F3HP with 55mm Micro Nikkor and a Tamron 90mm Macro with 1:1 extension tube. Plus a rail bellows. Use the Nikon on board meter.
I would ditch the rail bellows, you have macro covered with your lenses.
Now for the hard part, the scenic views. Medium format and/or large format? If medium format do I use 645, 6x6, or 6x7? My choices are Bronica ETRS with very sharp 50mm PE but smaller 645 format. Yashica TLR with 80mm normal lens in 6x6 or Koni-Omega with 90mm normal lens in 6x7. Or use a 6x7 roll film back on my 4x5 Crown Graphic with 88mm Bausch & Lomb and 162mm Optar?
In large format do I take the 4x5 Crown Graphic and use Graphmatic film holders, one with slide film and one with b&w film? Or go with a rail view camera for the 100mm WF Ektar and 190mm Ektar?
Should I haul a 5x7 with 250mm Commercial Ektar for black & white? Or all of the above? I think with large format any thing over 100 feet from the car is not going to be interesting🙂.
I am kind of leaning toward the K.I.S.S. principle, but then what if I need it and don’t have it? I am not likely to travel this way again for several years, if ever.
I think you will be better off keeping it simple. Take enough not too much. The LF gear may be too much as you said...Make sure it is all serviced or checked out. Hate to do that kind of trip and find out you have a bad camera.