Very interesting post. A good friend just got a Hennessy Explorer Ultralight and I might suggest the cleats to him and see how it works for him. Not sure he would be into cutting his rope for the ring/buckles system. The one drawback I see in your idea is the limitation of the tree huggers as far as fitting around certain size trees. Bigger tree huggers perhaps or make your own polyester
webbing tree huggers as you suggested. Not near as sweet as just wrapping the webbing around the tree and clipping the biner like the ring/buckle system. Might prevent some bruised bums though.