I'm not in your area but here's another vote for a commercial truck shop servicing Fords. I found an independent shop where two of the "& Son's" are RV owners and they've gone the extra mile for me including a long, after-hours phone call when I had a breakdown 100 mi from home.
My "guys" were even knowledgeable about hydraulics and were able to take care of some leaking slide hoses.
Even if there was a local RV dealer who serviced the chassis, I wouldn't go to them.
2002 Itasca Suncruiser 35U
Ford has an 800 telephone (not handy at this moment) keep it with emergency package in motorhome. 1st represents all participating Ford warranty dealers, 2nd (out of warranty) the Ford representative will find a service facility capable of serving YOUR unit (read blogs about numerous disasters of tow services-even good emergency plans-dumping your unit at service facility … ONLY to discover it will now cost you-outside of your service plan-to tow it to another service center)
I go to Rush Ford truck center in OKC for my chassis service. They are slow because I think the put their priorities with the big rigs ( 4 hours for a oil ) service on a E350 gasser) but they do good work and they check everything under the hood and along the chassis.