[spott]

Fuel in ground tanks can be pumped out by manually pumping enough to power a generator to power the regular pumps... which is pretty trivial to set up.

[988747]

Or you can just keep the generator fueled (they tend to come with built-in fuel tanks), and have a spare 50-gallon barrel of fuel stashed somewhere.

[anakaine]

Fuel in ground tanks can be pumped out with a manual hand pump. It's not that hard and frequently used on remote property tanks.