Grass in RV parks

We are in a KOA, and the grass is soft after a lot of rain and the RVs entering and leaving are making a mess.  The width of roads in the park are adequate, but the problem is the drivers charge through the intersections and into and out of sights without care.  The simple solution is to go deep into areas that require a turn, and then turn the steering wheel to the stop.  It is no wonder many parks are installing boulder size rocks on the corners and posts that can't be knocked down when inept drivers cut corners without being careful.