I like the rangefinder suggestions--Mamiya 6 or 7, Bronica 645 RF. I personally find the Fuji fixed lens rangefinders big and bulky, but you may like them.

My last trip where photography wasn't my main reason for traveling, I carried two folding fixed-lens rangefinders--a Voigtlander Vitessa-L 35mm loaded with Ektachrome 320T for indoors and night photography (it has a fast Ultron 50/2.0 lens), a Voigtlander Bessa II 6x9 with 105/3.5 Color-Heliar loaded with Fuji RMS rated at 400, and my little Digisix meter. This worked out quite nicely, and the limitation of the fixed normal lens just forces one to find the compositions that work with it.