Of course you can do it without bling, the bling just makes things a tidbit easier; it just replaces knots. That said, there are myriad ways to do it. Brandon uses a buntline hitch, from what I can remember. Knots are all personal preference, but I would recommend going around the tree, back to the tarp and tying there, so you get a triangle your hammock suspension can pass through without rubbing the tarp suspension.
Bookmarks