dude if you're lugging a dslr into the BC for those shots you should really really consider looking at some of the new csc cameras - sony nex series and the olympus em5. aps-c sensors on the sonys, the olympus is weather sealed, they all use interchangable lenses, you can use your canon or nikon glass - or your old leica if you have that kind of stuff, and they will fit in your pocket with a pancake lens on.
i believe these cameras are the future for backcountry...
I've looked into them. I do like the super high frame rates. 18fps for most of them? That is ridiculous. The biggest problem is they do not have an optical view finder. Makes them great for shooting scenery and such. Action? Not nearly as good. I'll stick with the DSLR.