Okay, I need some advise on cool-weather camping. Saturday night I got really cold as I camped out in the backyard to watch the Leonids meteor shower. My sleeping gear consisted of a ground sheet, then a 5" thick air mattress, a 1" closed-cell foam pad under me and a lightweight mummy bag, and fleece blanket on top. I was wearing wool socks, boxers, long-sleeve thermal top and a wool watch-cap. Before laying down I had some cookies and plenty of water. There was no wind but the temps got down to 40-45F. Fog rolled in around midnight making most things damp.

End result: really cold. Not to the point of shivering or hypothermia, but still dang uncomfortable.

Would a wool blanket have been better than fleece? I've tried those air-activated heat-packs before but they never worked in my sleeping bag.

Any tips for staying warm while watching the stars (no shelter) on cold nights?

-Blast