I haven't done much backpacking in a few years, but now that my son is getting old enough thinking its time again. It was always so hard to keep a small kit accessible with your full backpack. I have tried everything from putting it in the top of my pack, carrying an extra bag, etc, but nothing seems to work well. So my question is in the past few years sling packs have become very popular, and while may not be ideal may be the best compromise. Also I noticed that fly fishermen keep a pack on their chest and thought about going that route. Want to carry a FF DSLR body, couple of medium size lens, couple of batteries, filter or 2, etc. I always just carry the tripod in hand. So how do you do it?