Right now it is 40 but with the 20 mph winds TWC says feels like 30*. Lows tonight are forecast for 30, so with the wind chill should feel like 20* or lower. I have been to 30* (no wind) comfortably.
I'm layering my 20* incubator and 0*burrow with my Peapod. After my windy Mt Rogers experience I am using my cuben side tie-outs for the first time and set my tarp so low to the ground that I have to almost crawl in, and I put bricks over my tie-out stakes. I plan on wearing mid weight wool and a hat.
May be complete overkill, but I hope I won't have to bail out during the night...
Any other suggestions?