Instead of re-typing, I just copied a message sent to another user who asked me what he needed to prepare for in car camping. I stayed for a good 2.5 weeks and this year I'll be camping for 4-6 weeks.
"The coldest it got last year was negative 3 degrees. I usually roll down the window a few inches to keep the air circulating; I am just worried abuot the oxygen content even though there is plenty, just a fear. Don't sleep with car on. I did turn it on a few times during the night, but it takes time to warm up in super cold conditions. And then you'll fall asleep and forget about it and waste a lot of gas. Carbon monoxide shouldnt be a problem, but you never know. What I learned is 1 beanie and 2 pairs of wool socks. Your core should stay warm pretty good. I would wear pajama pants and a long sleeve shirt over a short sleeve shirt. Just cotton stuff too, nothing too fancy. Sometimes I would get so hot I'd take some layers off. My sleeping back is only like a 30deg. too. Also, I'd recommend a big gatorade bottle or something to pee in. You will not want to get out of your car in the middle of the night when it is freezing out; more/less get out of your sleeping bag. Your car acts like a fridge for food, but be careful on drinks as they will freeze, obviously. My gallons of water would freeze each night. Use your defroster in the morning and after skiing to dry out your socks, long johns, etc. It works awesome and doesn't take too long. I always dried them out after each day and even warmed them up in the mornings. Start your car in the mornings and then get back in the sleeping bag while you eat your breakfest bars, deodorant, etc. I hope this isn't too much, just trying to give as much pointers as possible. Oh yeah, also, look for places to stay that our somewhat safe. Apartment complexes are not bad, hotel parking lots, etc. In Breckenridge, there is like no where to stay. It says no overnight parking and stuff like that, so I'd always sleep in the Keystone resort parking lot. Just try to find somewhere that seems cool. I would get a power converter too for your cameras and such. I've got a 4 door tahoe too, what do you have. Any other things you are wondering about? Where you car camping at? Also, tryout that couchsurfing.com website. I signed up tonight, messaged 12 people, and already have 2 people that are going to let me crash on their couch for a few nights. That normally is not my thing at all, but I figure why not. ???"
