thanks for the advice guys! I'm now pretty confident everything will be okay. I will also buy one of those air pumps tomorrow and hopefully that will help
A power inverter from your car. Buy one rated at at least 750w and run an extension cord. Only run essentials and you will need to run the engine occasionally to keep the battery charged.
I've done this and it works. Add up the watts your equipment uses and make a descision. A motorcycle will also work if it is a 12v motorcycle. Bottom line, a 12v DC to 120 AC inverter will run you about $30 anywhere, maybe cheaper at a Walmart, maybe.
Just my 2 pennies.
With the water temps that low, I doubt you will have any problems with dissolved oxygen.
The only thing that really needs to be done is a water test. If there are no nitrites or ammonia and the fish aren't gasping, then you can just sit back and relax.