Assuming you are planning on 5 to 10 miles hike with 25 pounds of gear and pack, I would go with the f-stop if you happen to fit and find the harness comfortable, otherwise get a big day pack, small overnight pack, or expedition pack as needed, with a wide panel access. Consider tactical-style bags with inch-wide outside strapping (Molle) if you like to hang lens cases all over the place. A pack with top access only is going to be a PITA. I have a torso length of 14.5 inches, that second option has been right for me for longer hauling.
My personal options have been women's packs, Osprey Ariel 55 for weekend camp with camera, Gregory Jade 38 for day hike with ample room for extra clothing, etc. For full size tripods I use the f-stop tripod bag (long stuff sac with daisy chain and d rings) strapped onto the bags. I use f-stop inserts.