some great ideas on here. IF you are to try and use a heater, its always a good idea to be awake, as there have been many fires that i know of that burned down tents and more then one Soldier that has been killed due to this.
Depending on how cold you are, or how much you want to warm up, you can always use the 2 person in a sleeping bag. Both people's body heat warm each other up. Granted, most people are against this unless they are married, or they are about to freeze to death.
As I have also done more then a fair share of cold weather camping, including being out in Korea in the winter. One of the more important thing is to watch the extremities, so sleeping with fresh, dry socks, or even putting on gloves as well as a good hat helps as well. The hat is one of the most important things, since most of your body heat is lost through your head.
As was pointed out here as well though, make sure you dont overdo it either and then you are sweating to death as well.
Depending on how cold you are, or how much you want to warm up, you can always use the 2 person in a sleeping bag. Both people's body heat warm each other up. Granted, most people are against this unless they are married, or they are about to freeze to death.
As I have also done more then a fair share of cold weather camping, including being out in Korea in the winter. One of the more important thing is to watch the extremities, so sleeping with fresh, dry socks, or even putting on gloves as well as a good hat helps as well. The hat is one of the most important things, since most of your body heat is lost through your head.
As was pointed out here as well though, make sure you dont overdo it either and then you are sweating to death as well.