So I've hung in my hammock two nights now. The first was one of the best sleeping experiences ever. I used an old sleeping bag cut down the side and wrapped under the hammock as a under quilt. This kept me warm, and comfy all night long. The second attempt I tried to lighten my load and used a sleeping pad (foam) that I had trimmed to the shape of my body. I got a ton of draft and air coming in at the sides of my sleeping bag through the hammock, and couldn't seem to stay on the pad all night long. Probably one of the worst nights ever. I ended up hiking to a shelter on the AT to try and get a decent night sleep around 3a.m. I'm convinced the under quilt is the way to go. I'll be making my own ASAP. I doubt everyone feels the same, but no more pads for me.