A quick check using my 2008 Trailer Life Directory shows 3 service centers listed within 10 miles of downtown Dayton but I have no knowledge of how good they are service wise. I provided their email address and phone number so you can contact them for information and directions.
1. Lewis RV: about 5.25 miles East of downtown Dayton.
lewis-rv@sbcglobal.net, (937) 253-6242
2. Brandt Trailer Sales: about 3 miles northeast of downtown Dayton.
jonc@woh.rr.com, (937) 236-0200
3. McNulty RV: about 9.25 miles northwest of downtown, Dayton.
rgm@woh.rr.com, (937) 836-9911.
There could be others, but I hope this is a start.