My sister lives in an area where the power goes out frequently. She
has asked me more than once to "just" come out and add a plug for her
so she can use a generator to keep her food from going bad. This is
never going to happen. Not so much because I would not do it for her,
it is more because after the first season or two of no maintenance on
her generator, it would not crank anyway. I know this from listening
to the kids complain about the four wheelers not working or the
lawnmower is "broke"

If I were to set her up with a generator, I think I would add a lock
out switch to her existing panel. This way, she could use anything in
her house. The only bad thing about doing this would be if she could
not use self control and try to overload the circuit. Having the
breaker trip a few times might give her the message.

When the power goes off, just turn the breakers off to the bedrooms
and huddle in the den with TV and gas heat.