So, I just bought my first hammock (of Amazon) and it came with the hammock (obviously), with rope rings attached, and two extension ropes. I know the two trees I want to hook it to, but the directions are pretty much only useful for starting a mini fire. I don't want to screw in hooks or anything. I just want to tie it to the trees. Can anyone suggest a good, easy knot to use that will let me take the hammock down quickly?