I think in backpacking 4x5 that a Graphic is good, depending on the what else your carrying and how far. If it's say 10+ miles I'd probably go with a Quick Load system thats lighter. The camera does usually weight in at +/- 6lbs plus stuff and some of that stuff is a tripod, and don't forget that water isn't light if your in arid territory. Watch when buying an appropriate lens for the general distance of the vista. Usually a couple of lenses are best to cover short and long. If you want to go light without spending alot of money a 2x3 Graphic might do better, albeit in a smaller format.