running generator all night

We run our onboard genny as we see fit with regard to whatever rules are in place. We have on a couple of occasions run it through the night but it is rare. We do camp off the grid often in extreme temps (both hot & cold) and have run our genny extensively as required to keep comfortable but there was always a few hours daily where we would turn it off as our rig would remain cool or heated for the duration. I wouldn't hesitate to do so if the situation calls for it, we didn't buy an RV and a HD truck to rough it, just would have kept tenting it and saved a bunch of dough.