I've been thinking about my tarp ridgeline lately, and how I can protect the tree's I attach it to. My ridgeline and guy-lines are all 1.2mm Z-Line. It's a spectra sheath with dyneema core, and somewhat abrasive. I also worry the very small diameter will dig into tree bark and cause damage over time.
I know a lot of people don't worry about the tarp causing damage, but from reading here it seems like many have reported damage to tree's from their tarps cordage.
I'm also concerned a park ranger will take offense to the line directly on the tree on principle. It make sense to protect tree's many people will potentially hang from, as damage over time can accumulate. And I'm all for encouraging practices that make us appear an environmentally conscious group.
I currently use a marlin spike hitch on my hammock tree straps, but I don't really trust that for my tarp. The tree straps need to be long enough to get around the tree, but not so long you need extra space to hang your tarp. Basically they need a way to adjust to tree size.
My idea is to create straps from either 7/8" or 5/8" grosgrain. Sew a fixed loop into one end, and feed the other end through, just like hammock straps. Here's the key, instead of using a marlin spike to create an adjustable attachment point, use a tensionlock style strap adjuster to create an adjustable attachment point.
Let me know what you think,or other solutions for tarp tree huggers!