This is good stuff! Thank you!Having been full time now for awhile, and traveling in two different combination of rigs, I'll give you my wants for the perfect campground.
When we were in our 43' pusher pulling a long enclosed trailer we only targeted parks with 100' pull through spots. We stayed in many without such sites and used back-in spots, however they had places we could easily drop our trailer, like a large open lot. With our current 44' fiver we really don't care if the site is a pull through or back in as long as it is actually big enough and I don't have to cut across mud to get into it.
Sites have to be as close to level as possible. Along with that there needs to be two sewer drops and they need to be the exact same level as the pad. We have visited several parks where the sewer drop was actually a little higher than the pad. One night at a park like that and we never returned.
Work campers and other RVers make the best office workers. They will understand your customers better and relate better. We use a wonderful county park up north about every summer on a local river. It is an inexpensive great little place but they insist on hiring local retired non-RV office help. They are impatient and rude, being there just for the part time gig.
The other requirements we look for in a good park are the obvious ones that have already been mentioned, like good working hook-ups, etc.
An understanding and forgiving money refund policy is also a huge plus. If someone makes a reservation and has an issue on the road don't be money hungry and keep all or part of their money. If a customer lets you know by 6pm or so that they can't make it then refund their deposit or funds in full and ask them to consider you next time.