We saw a Testa X towing a 20' Airstream trailer(US plates) parked in a campground in Newfoundland in the fall and of coarse the car was re-charging. Tesla just showed their full sized EV pick up truck(500 mile range) last week and other manufactures are to soon follow. Campgrounds will see more EV's in the future that are the tow vehicles and not just the toad. As mentioned, these charge using 240volts/48 amps. That may not be much more power being used than a RV with 2 AC's running plus other equipment. Example our AC/heat pump 30amps, water heater 12 amps,
Kuerig 15 amps, Microwave 12 amps, etc.