Make every effort to find a unit that can run off 12VDC.
There is nothing worse than being camped next to someone who has to have TWO Honda 2000's running ALL NIGHT LONG to run his CPAP. I'm tossing and turning while he's snoozing away in air-conditioned CPAP-fed comfort. Then at 4AM one generator runs out of gas, and the other one goes to WIDE-OPEN for the next three hours.
If I didn't absolutely have to be there the next day I would have packed up and left.
The one thing I don't understand is, can't you live without it for ONE night? I mean, you've lived 50, 60, 70+ years without it. Is one night going to kill you? If it were me I would go without the thing rather than inconvenience everyone else at the campsite.
If you can't live without it one night, or if you camp frequently, there is NO EXCUSE for not getting one that can run off 12VDC. Heck you want that for power outages at home anyway.