I bought a Lowepro Rover Pro AW (what an awkward name!) a couple of weeks ago in order to do hiking/backpacking. I can put 40lbs of camera gear in it and walk for 2 hours without any real discomfort. If anything, I realized the need for a lighter tripod. However, the pack is great and very well thought out. I can put my 5x7 and related gear into it or I also had a full RZ kit in it with plenty of room. I would like one of the photobackpacker cases for the 5x7 but need to measure my bag first.