One thing to perhaps keep in mind. An 89 Prevost looks pretty much exactly the same as a 2000 model. It wasn't till the XL2 models came 2001 that the body style changed significantly. The people at the resorts won't know a 1999 from 1989.
I think if you look back at older threads, you may find a story (if I remember correctly) from Dale, where they were going to an RV park, and incorrectly calculated the 10 year mark when telling the office people the age of their coach. They ended up having their "eleven" year old coach being inspected, which as mentioned was nothing more than a "peak out the window"
Ray