Hi Phil,
I'd be terrified to run a generator while sleeping. When I do run it I load it up as much as I can. I'm fortunate to have a Magnum inverter charger that is temperature compensated with a sensor on the battery bank. This lets me charge at 125 amps.
My biggest overall load is probably my laptop which runs pretty much every hour I'm awake (and some when I'm asleep, too).