At about this time every year interest increases in the question of what equipment can work well for back-country photography. Over the years I’ve working out an approach that seems effective for my photography. A few years back I wrote an article here describing this, and I just made a few minor updates to it this morning. If you are interested, take a look at this description of my “Backpacking Photography Equipment.”
Keep in mind that my goals include making photography a primary focus of many of my back-country trips – so I’m perhaps will to endure a bigger load of gear than some might be willing to carry. Also keep in mind that I’m working to create photographs that can be turned into rather large and high quality prints – if your goals are more modest (and for most people, they should be!) you probably want to consider a somewhat different setup. Differences in your subject preferences – wildlife? macro? – might also suggest a different setup than I use.