I had a good bit of work done by
Blue Moon RV Service Repair Mobile Motor Home Repair Dallas Carrollton TX
One service call and I otherwise took our '83 Silver Streak
to their shop and camped there 3-4 days. No complaints in a general sense, but no "serious" work done either. They are decently-run and -- like all in this business, expensive -- I have no qualms with recommending the owner or his men.
I went through a series of preventive maintenance things: remove & replace A/C unit (new gasket); remove and replace sealants on all roof penetrations; replace converter, new awning arms, etc. I had another mobile tech install an EVERPURE system for me who also did a fair amount of electrical checks (but he moved to Florida).
This was in 2007 when we were full-timing.