Hi Paul-I never wanted to hike 100 miles w/photo gear. But on shorter trips here in NC Pa. we have some rugged country. As another poster stated, lay out your gear photo+camping & find the pack which it comfortably fits into. My photo gear goes into a belt pack w/3 pockets. This in turn lays inside the pack on top. If a tripod is carried make it carbon fiber with ballhead. Best advice is to be fit.
Curt