I'd go with one of the RF bodies (and the 2nd if you're one of those always bring a 2nd body people), the Hex 35, 50, and 90 as well as the ZM 21. I'd leave the 40 even though it is tiny, but I'm not a huge fan of the focal length, perhaps its best to bring along. The Welta goes as well, as well a cheap p&s.
I'd load up on tri-x/arista premium and whatever color film you're planning on using. On a lot of my trips I find myself bringing Acros and Tri-X for my film camera then doing color on my digital. Acros covers all the bright days, and Tri-X can cover everything else, especially with your lenses being 2.8 and faster.
To be fair though, when I go on trips I usually bring 1 digital body (slr) and 1 film (slr or rangefinder, depending on if the Leica is working). Usually the film body has a 35mm stuck to it, and the digital with a 28-80 equivalent zoom, everything 2.8 or faster. Usually the Canonet goes too, since it takes up no space, and it's so light I don't use a strap, it's literally on a lanyard.