"Sounds like you were polite but I'm totally confused about the layout, so I have no idea if she parked incorrectly or not."
Hope this helps, hope I'm correct:
Drive Though camp sites facing opposite directions with the RV hook-ups between ever 2 campers. The hooks-up would cause the campers to be back-to back. The front would be shared yard between 2 campers. The car was parked between 2 campers (in the yard) area. (RV net edit does not arrows ... the " - " is the front of the camper.
Camper -
- Camper
Hook-Ups
Camper -
- Camper
She parked her car here (x) where both campers face each other.
Hook-up side
Camper -
x
- Camper
Hook-up side