Ditto on doubling up sleeping bags. I've car camped below zero many times, using 2 bags, lots of clothing layers, wool booties, mittens, etc. My 2 bags are a EE 20 degree down and a 1980's REI winter down (don't no exact rating, probably 20).I watched a winter camping video where a guy used an electric blanket. It ate up batteries like crazy. I camped out on the lake ice fishing with my son twice this year. We were more than comfortable running a mr buddy heater while we were awake and combing a 0 and 20 degree bag while sleeping. Slept like a baby with temperatures below zero. It seems like a lot less headache than trying to run a system requiring multiple deep cycle batteries.
Many report that hot water bottles work well. I bought a Nalgene winter bottle, but have not used it yet.
I watched a winter camping video where a guy used an electric blanket. It ate up batteries like crazy. I camped out on the lake ice fishing with my son twice this year. We were more than comfortable running a mr buddy heater while we were awake and combing a 0 and 20 degree bag while sleeping. Slept like a baby with temperatures below zero. It seems like a lot less headache than trying to run a system requiring multiple deep cycle batteries.
Ditto on doubling up sleeping bags. I've car camped below zero many times, using 2 bags, lots of clothing layers, wool booties, mittens, etc. My 2 bags are a EE 20 degree down and a 1980's REI winter down (don't know exact rating, probably 20).I watched a winter camping video where a guy used an electric blanket. It ate up batteries like crazy. I camped out on the lake ice fishing with my son twice this year. We were more than comfortable running a mr buddy heater while we were awake and combing a 0 and 20 degree bag while sleeping. Slept like a baby with temperatures below zero. It seems like a lot less headache than trying to run a system requiring multiple deep cycle batteries.
Many report that hot water bottles work well. I bought a Nalgene winter bottle, but have not used it yet.