I have two Grand Trunk Ultralight hammocks. In an effort to control costs, I have managed to hang both hammocks together and slide my Walmart blue CCF pad in between for insulation. The tests I've run in the garage indicate that this might work well... We'll see when I get to go camping next time.
Has anyone tried doing this? It adds 300g to my overall pack weight but is more comfortable (and infinitely more adjustable) that simply sleeping directly on the pad.