We go to Oshkosh every year. The campground we stay in is privately owned and I've sort of helped them out the past couple of years.
There's a "regular" that comes in with a 2500 Ford diesel pulling a 35+/- 5er. He pulls in, stops in front of his campsite, gets out of the pickup, tells my brother & me "have at it".
My brother & I can park a trailer or any RV pretty quickly. We discuss a plan (quietly, while "surveying" the site) then one of us backs the unit in while the other one is giving directions. After we start backing, we usually don't say a word.