Wiring harness for Camper

I have the bed plug and the plug on the bumper. I haven't used the bed plug. It gives me the heebie-jeebies not being able to get to it after the camper is loaded. If I ever do any boondocking I will want to unplug it to prevent truck battery drain. I usually plug into the camper after I'm under it, then plug into the bumper receptacle after the camper is on the truck bed. I use a cable tie to secure the cord to the bumper support. Also put a loop in the excess cable secured with a cable tie and put the loop in front of the fender well.
Your dealer should have a longer cord if you don't want to drill a hole in the bed.