My friend Sgt. Rock asked if I would illustrate how to use the Dutch Hook and a Prusik knot. This illustration shows end-only tie outs for the ridge line, but you could easily use a full-length ridge line with Dutch Hooks if you desire. The only change would be to attach one Dutch Hook to the line with a Prusik. In this way, you would clip one Hook to one anchor point and the opposite side would be adjusted with the Prusk attached Dutch Hook.
Looking at how you would do the Lark’s head to a fastened D-ring with prusik, I came up with two options neither are quick or smooth to tie.
Why not simply run the tarp ridge line around the tree, and prusik it back to itself? No hardware needed.