What a bummer...do the best you can. Only the spring will tell as you get everything up and running. Here is another possible thing you could do since you don't have shore power, you don't want to kill your batteries running a fan. (I will probably get thrown under the bus here but it beats breaking something)....just buy one of those little buddy heaters and hook it up in the middle of the floor, connect to a lp tank, slightly crack your roof vents and run it. No one is inside just disable your co detector so it doesn't go off, and visit each day. IMHO anything to get some heat in there... and since you have no power these little guys put out a lot of heat and use no power...just a thought.
