My interest will depend in large part on the date, as we have a fair amount going on already this spring and early summer.

DH and I cohosted something similar last April for Roadbikereview's forum. My best advice is to tie into an existing organized group road ride, e.g., the Horsey Hundred or the Hilly. It's a lot harder than you might think to coordinate a group ride for people who are unfamiliar with the area and who will likley have varying abilities. This is especially true in Southern Indiana where the terrain can be pretty challenging and the roads in questionable shape.

The logistics were overwhelming enough that we declined an invitation to host a Midwest RBR ride again for 2011. It was just a lot of work. In my opinion, it's far better to let somebody else worry about routes and SAG support.