I've seen that size of fee for a simple service at RV dealers before - RV dealers just charge their huge hourly rate for everything. There's no motivation to charge less when the tech could be making the same $$ on another job. And too many people seem to thing that everything on a RV has to be serviced at an RV dealer.
But I would double check to make sure it's apple-to-apples. Maybe, just maybe, the dealer was including a chassis lube or something. And the Ford dealer may not even have a bay that will handle your Bounder.
Former owner of 2004 American Tradition and several other RVs
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC