Refrig on battery or propane overnight?

[shunter917]

We are planning a 2 week trip in October. We will be spending one night in a hotel. I am wondering the best way to run the refer overnight while we are there.

I am concerned that running the refer (and fan) will drain the batteries (2 in line 6 volt - around 200 amp hours), since it will be parked 12 - 14 hours (about 5 pm to 7 am). I have thought about opening the TM just enough to switch the refer to propane, then closing it again. In the morning, I would open it and switch it back to 12V.

I am worried, though, that there won't be enough ventilation for the propane burner. I certainly don't want either too much heat to accumulate in the refer cabinet or for poor ventilation to cause the flame to go out, which would just allow propane to leak into the TM all nigh. And can I/should I shut off the fan while it's just sitting in the parking lot?

Any opinions appreciated.