Tip 1: Do everything possible to insure that you will be turning on the driver side. Even if it means driving around the campground and up/down a few roads to get yourself turned around. Passenger is your blind side and should be last resort.
To me this is the most useless instruction. Every campground I've been to has one way streets and most of the sites are angled to aid in backing in when going the right direction. Just my experience and .02 worth.