We have been fortunate so far to be close to Freightliner maintenance, but you will find that many parks have a "roving" RV maintenance preference who may have permission to do some of that for you at your site. The park can control that better. It is often more reasonable cost wise than breaking camp and wandering somewhere.
Many parks are near some sort of water, either natural or impounded, and they are extremely sensitive to the idea of "spills". Would not be surprised if it was in their insurance in some way.