We stayed on C232 and C224 in a Class A. Both were level but you definitely became close with your neighbors. Due to the proximity of great things to do in the area the closeness of the sites didn’t bother us as we didn’t stay in the coach except at night.

None really, you are parked right on top of each other. There is no enforcement of vehicle and boat trailer rules. We stayed in the no power tent loop which wasn't as crowded

All the campsites are fairly level. Most are out in the open with a couple rows having more mature trees that may give you shade. You may want to look at Google Maps and the reservation site to compare where shade may be if that is a concern for you.