MF is probably the best compromise in that situation. If you do decide to get a new camera, make sure you have enough time to use it and get familiar with it. Otherwise, it's better to stick with what you know. For European travel where I'm mostly going to be walking around in cities, I've had pretty good results carrying my Bronica S2a kit, usually 5 lenses and 3-5 backs (-1, N, +1, color, flexible), but on any given outing, I usually take 1-3 lenses and 3 backs.
As for film, use what you're comfortable with. You don't want to be testing out a new film on a trip you may not repeat.