Fiberglass trailer with temperatures in single digits?

I sometimes take my regular not-very-well insulated trailer out when it is 30 degrees at night no problem. I sometimes go out to the camper in the winter time and clean/repack/ sleep in it during the winter when it's cold but, it is kept in a warm shed. It will be 17 below here on New Years Eve. I will not be doing anything in the camper. There is no way I can keep it close to warm. Heck, my furnace will run continuously in weather like that just to keep the house warm.

My trailer is fiberglass, I've camped below freezing, the furnace does a good job keeping it warm. Better yet is a small electric heater supplemented with the furnace. The smaller the fiberglass trailers are even easier to heat. As usual, condensation is the biggest hassle. Many owners stay in them for a night or 2 as they head south this time of year as will we in a couple weeks.

A guy on the owners forum mentioned just today he stayed in his last night at 5 degrees in central PA, had the furnace and a 1000w electric going with the temp set to 55. The windows iced up but that was it for issues.

cbshoestring wrote:
...climbing into my fiberglass shell to turn on the bunk heater.

Yes, I just quoted myself.

I was half joking when I said they were nuts. I spend most nights in my version of a class C..or is it a short A ????