On my Gregory Pack I have a small attachment strip high on my shoulder straps. Would love some kind of pouch that could attach along the strap and be out of the way of swinging arms, but big enough to carry a couple of items I would like to be able to get to quickly while hiking, and weather resistant. I'm guessing something about 4 inches X 6 inches. Anyone use anything like this, my trip to REI did not turn up anything for strap attachments. Any suggestions or what you use? My waist straps have pockets that are just mesh and about the size for 1 cliff bar each.