Over Thanksgiving, I'll be "boondocking" in a family driveway. I can plug in to their house power at 15 amps, but that will not be enough to power everything we need at certain times. Can I power up...
Be aware that you may not have 15A in the driveway. A very common house circuit is a 20A CB with multiple 15A plugs. So there could be other draws on the circuit you're using. If they have a 20A dedicated plug (only one on a 20A CB) use it.