Sometimes, a little mass is actually good!
I have set up my HH with buckles & Chain Links from AHE with polypro straps. I sewed a loop in the far end of the straps for carabiners. During a short test hang yesterday I chose two trees - each about 30" in diameter for my anchors.
Since I was unable to reach around the trees, I simply used the 'biner as a weight to fling the strap around the trunk.