If anyone has some experience with one or ideally both would be great. I am about to buy a backpack for some new gear (includes Canon 300mm 4f/l prime lense for size reference).

I will most likely be doing majority of photography travelling or at sporting events, though it will include a couple of weeks in the snow doing photography of skiers. Obviously the Dry Zone would be made for this, though I wanted know if anyone who does photography on the snow uses something else and has it been ok? The trekker (or equivalent) seems to be a better and more accessible pack.