I plan on doing a 4 week trip into the bush this coming summer and I need your advice on backpack selection. I currently own an Ibex 80 from MEC (76 Litre capacity) but I think I am going to need something much larger if I'm going to make it for 4 weeks. I plan on bringing in as much food as I can and supplementing that by foraging for wild edibles and hunting/fishing. Any suggestions on what type of pack I should try? Obviously, I need something quite large and comfortable. I won't be going on any established trails either so it needs to be fairly sturdy and reliable. Thanks for the help.