I emailed privately earlier, I am also based in the Dayton area but, mostly sail out of Brookville Lake http://www.blsa.us/ in eastern Indiana.
Beyond this lake, there are a number of other sailing points in the area. They include COWAN LAKE (_Link to Cowan Lake Sailing Association), HUESTON WOODS LAKE (Link to Hueston Sailing Association (HSA)) and Eastwood Lake (Hydrobowl) (email@example.com)
This will give you a start. I encourage others to post so that we can get to know each other.