Find and Plot Cell Phone Towers near you.

[Skvez]

Thanks NR,

Most cell towers are mains powered with battery back-up.
Only the ones that are remote from the mains (up a mountain in the middle of no-where) have gensets (usually a solar, possibly wind powered with generator to top up the batteries if there are lots of calm cloudy days). Of course "in the middle of nowhere" is exactly where we want to be in an event.
The genset is probably too big to move without a truck and lifting gear. (probably about the size of a chest freezer, maybe a little smaller)
There might still be fuel there depending on how quickly the situation degrades to the point where you feel comfortable stealing (err 'borrowing') it.
I believe (not 100% sure) that the cell tower should stop draining the batteries when they get low rather than flatten them to destruction. So they should be useable for a few months but will probably need charged.