Just another option to consider. Personally, I like a chest box, rather than a pack. The two I know of are Richardson and Downs chest fly boxes. I have a Richardson, but the Downs looks very similar (cheaper, but plastic instead of metal).
They are comfortable and flies are incredibly easy to get to. My camera, when I take it, is velcro'd to the front of the box which makes for quick and easy access. Keys, shot, tippet, etc. is put into a coat pocket in the wintertime, and in the summer it hangs out in a small belt pouch. Nippers, thermometer, leader straightener, etc. all are attached to the box straps with zingers.