We use an air mattress. We just strated camping last year because our friends go & my wife wanted to try it. I figured she'd never go but she did.
One of the conditions was an air mattress last year I think we had about 9" this year we went to a 22"(measures about 20"). It does make it easier getting up off the ground. We only car camp. If I where to do something with my brother and it was just me we wouldn't be taking the air amttress to big to lug around in a pack.
It did get a little cool when we've been camping at night just put a hat on or if you can't find it pull the blanket over your head(that's what was cold)
If it where really cold the air circulating would be an issue.