I wasn't able to walk as much as I wanted/hoped last year . . . and had to ship my backpack ahead when I resumed walking after a knee problem. I am hoping/planning to walk again in 2016, so am beginning to look at pack alternatives to what I used last fall. The doctor(s) I have talked to have suggested a much lighter pack and overall a lot less weight, shipping ahead again, or another alternative - thus my question. I did see a couple from France at one point on the Meseta with rolling packs hooked to a waist strap . . . like a travois behind a dog/horse. Anyone used one of these? How successful was it for you?