The tarp I'm using is the MacCat Deluxe. I've adapted it for easy use with the Clark's by sewing a couple of "D"-rings (one on each end) to the underside and off set from the end a bit. I also used some shock-cord and a couple of barrel-locs (used for draw string closures on stuff sacks) that allows for fast adjustments to the height of the tarp. So, I can lift it very high for better circulation and more standing room, or lower it for storms, as well as everything in between. This also eliminates the risk of damaging anything because of the shock-cord between the Clark's and the tarp. This same setup works great for the Clark's Canopy as well, however there in no need for the added "D"-rings. I have also attached a small hard plastic hook to the end of each sock-cord (the end that attaches to the hammock) and this allows me to attach and detach the tarp very quickly and easily. This facilitates quick setup\breakdown of the tarp separately from the Clark’s. Simply attach the tarp to the tree’s and once the Clark’s is attached to the tree’s I just lift up on each end and place them on the hooks. This setup also eliminates the need for the big bungee cords that attach the canopy to the tree.
I also have a great way of attaching the Clark’s to the tree without knots and tree huggers and I can use several different methods using the same setup.
Just so everyone knows, I’m the individual that told Gary at Clark’s how to set one of these up like a tent. He had no idea that this could be done until then. I have since refined it for a quicker and more functional setup.