I'm close to buying my first DSLR. The Nikon D40 and Canon XS are my current favorites, but I thought I better ask before I made the investment. I plan to take my camera in the outdoors backpacking and fishing. Besides doing my best to keep it dry, is there anything else I need to consider when hauling the camera around in the elements? Does this change the models I should be considering? One benefit I like in the D40 is its small size and lightweight. Will it fare ok otherwise for backpacking/fishing? Thanks!