I'm building a tensahedron hammock stand, but can't find the answer to one question: How much tension do you normally see on the guy line that anchors one end to the ground? This is a critical question for me, because where I do most of hanging is in an ancient lake bed -- mostly sand. I need to know what sort of anchor is required -- ideally, I could get by with a bucket buried in the sand, but that may be too much to hope for.