My next load out is going to be a Snugpak Endurance desert (pic) flanked by two molle attached green Hazard 4 Plan Bs. (40L+17L+17L). Could just get a rocket pac, but this way my fiance and I both have a scouting bag after we have dropped our camp bags, and the overall size is larger for extended hikes.
http://hazard4.com/products/packs/slings/plan-b#