[Garfman]

Keep Your Daydream is a YouTube channel which just posted a video How to Back up Without Yelling.
It is a must see for anyone with a spousal unit who intends to back up.
As a truck driver my one piece of advice: GOAL. Get Out And Look
Your spousal unit can act as another set of eyes.
Campground owners and employees typically have no idea how to maneuver.
You need to get a lay of the land before you position your rig to start your back in.