I live less than 10 miles away from the Fairfield Location of Tom Raper RV's.
There are plenty of dealers in the Cincinnati area...
Colerain RV (US27 & Struble Road)
Tom Raper RV (US Rt 4)
Couch's RV Nation (US Rt 127)
Couch's RV (US Rt 4) No, thats not a typo. They are brothers and split up the family business.
Cincinnati Campers (US Rt 42)
We had our N2U coach examined by Tom Raper and were pleasantly surprised by the outcome. You can read it here... HUZZAH!!! She Lives!!
The Couch Brothers have a location in New Miami, Ohio. Just north of Hamilton if you're looking on a map. The selection of RV's is pretty good. I have no knowledge of their service, but their parts department is abysmal its an empty showroom with just your basic essentials. The other Couch's RV on Rt 4 between Hamilton & Middletown Ohio that's next to the derelict "Americana" amusement park, is HUGE! but they cater to mostly fifth wheelers and smaller TT's - No coaches. The Parts department is good, and they've got a good selection of accessories, but again, mostly for 5th and bumper pulls. We bought our old Hybrid TT from that location and Jerry Couch is awesome!
Colerain RV has a very wide selection of trailers and coaches on their large lot (visible from I-275 at Colerain Avenue Exit) , and my wife says their parts department is really good too. I have had no personal experience with them yet.
Cincinnati Campers is/was located in Mason on US Rt 42 and I will never go back to that location again. Parts department looked like a garage sale with things scattered all over the tops of banquet and ping-pong tables. Service department was non communicative, rude and terrible with customer satisfaction. I still have their number in my mobile phone contact list with the header "Don't you ever call this number!!"
That is my extent of knowledge & opinions of RV shops in SW Ohio area..... FWIW YMMV