If you plan on doing any hiking at all, get a field camera. An old Deardorf is nice and relatively portable. Deniz is correct when she quotes prices. They work well and hold their value.
I have an old Burke & James with the battleship gray paint and the red bellows. It is sturdy (robust might actually be a better word) and will last longer than I will, but it is not a joy to carry around. I've already made one trip to the chiropractor, so I have a helper or I don't take it out of the car for a walk. No problem shooting next to the car, but I don't drag it around in its little trunk with all the stuff inside by myself anymore. It does have a reducing back, so I can shoot 4x5 as well as 8x10. I've never tried 120 roll film, but come to think of it......