This is what I've done. Three removable panels and a short cord to the bumper mounted plug. Powers my heater, AC, my fan and my TV set. It's a 2,000 watt Honeywell inverter generator.
Used a 2" front receiver hitch with locking pin. Can take it off for car wash or service if needed. Pull the pin and slide it out. Using short cord so I can move the vehicle to get fuel or change positions to keep sun out of my eyes.