I'll be visiting my parents this week and keeping the camper in their driveway to sleep in (COVID measure). I plan on running the heater and some interior lights but nothing else. Since I'll be using ...
I keep a Kill A Watt meter plugged into one of the outlets inside the camper to keep an eye on the voltage.
While he's in his parents driveway powered on an extension chord, and wants to use a 1200W or 1500W electric space heater, I would recommend another dedicated 12AWG extension chord tucked through the slide to power this heater. I don't know if I'd trust the cheap camper outlet to power the electric heater while the camper is on an extension chord.