rook2c4 wrote:
Either a 35mm or 50mm lens will do just fine.
Being on foot rather than shooting out of a vehicle window, you won't really need a zoom-tele lens. Just walk up closer to what you want to capture within the frame and shoot. Want more in the frame, take a few steps back. Not only are both of these lenses low weight and compact, they are practical in low light situations. For the purpose of all-day hiking and camping, these are the lenses I would be looking at.
I agree with the above. A fast prime will enable you to control the background focus, and your feet are the zoom. The camera itself is a load. Why add more with a big zoom?