I want to hang a punching bag from a tree in my backyard. Since I would only put it up when I need it, I think that using rope would be the best way to not damage the tree while having a "permanent" anchor setup, but I'm not very knot savvy.
I found stuff like a cow hitch, but that seems to need something in constant and tension for it to work, and a tensionless method for climbing with many wraps around the trunk, but I feel like it could end up damaging the tree.
My gut feeling is having a few wraps around the branch with enough slack to get a bite in the middle, tie a square knot to hold the loose ends and be done. Would that work?