Steve said :
There are already numerous SxS shoots in southern Michigan, Indiana and Ohio run by an organization called the GLSSA (Great Lakes SxS Assoc.). These are all low-key fun shoots. You may be reinventing the wheel.

They must not advertise them very well, because I don't hear about them. There website hasn't been updated since 2003.
Run with the idea Paul. You don't need 200 people to have a good time.