I'm heading up to Rocky Gap State Park (http://www.dnr.state.md.us/publiclan.../rockygap.html) for some volunteer work. I'm leaving on the 18th and camping so I don't have to wake up uber early on the 19th.

The story: The last time I slept in my HH was on the beaches of Oahu, HI where I didn't need a pad or really anything other than a sleeping bag. Will using a sleeping mat give me some extra warmth for the 40 degree night I'm facing in the upcoming couple of weeks? I have a REI full size mat but I'm thinking that probably won't work out too well...

What to do, what to do?

-Rob