Campinfan wrote:
Natural gas would be my first choice, then gasoline before propane tanks because it is easier to fill a five gallon can than re-filling propane---meaning the stores might be closed.
In an RV setting, I would agree. Propane is a pain to refill, particularly when looking at 30lb tanks when you can easily burn a full tank in a day.
But in a household setting if using propane, you likely already have a 500gal tank to feed the furnace and stove, so you should be able to run the generator for weeks giving plenty of time to get it refilled.