LOVE all the responses, many from people that have never experienced real cold. NO you will not die at -30 if you are prepared! YES you can camp in -30. YES vehicles run at that temperature (gas & diesel) I have been doing it for years. Will it be comfortable? It can be bearable but real comfort I would say no but it all depends on what they are doing and what they expect.
The original post is way to vague to make much comment on -
1 - Are they living in the camper 12 + hours a day?
2 - Are they only sleeping in the camper?
3 - Do they need to have the water system running (they have a cassette toilet so I would not have the water system running).
4 - Do they have an emergency escape? If the camper gets real bad can they go inside a stick building for a night or two?
I have camped in those conditions and have enjoyed it for a few nights, I think if I had to do it for longer I would really modify my life to reduce the amount of time in the camper and I would completely cover up the windows & walls with heavy down filled comforters to add to the insulation.
If they have power then an electric heater is great. I use an electric heater for my main heat, the RV furnace for a back up and a cat heater for the emergency back-up.
I was camping a couple winters ago in the tcer and a guy pulls up beside me. He was 80 years old and slept in the back of his vehicle. In the morning he would go swimming in a hotel pool($5)and shower then head out for the day snowshoeing and cross country skiing and at the end of the day go to the hotel again to shower and swim, cook supper outside and sleep in the van.
