Called.

They meet again March 1st and the proposal for a "car show of mostly newer vehicles" will be discussed, after which they will give me a call back. They have not rented it out in the past but they do have lawnmower races and tractor pulls there June 11th and the Field Day of the Past each September. Other than that, it sits unused. Because they have not rented it out in the past, there is no set rental fee, which would be decided at that meeting if they agree to rent it out.

Doesn't look too likely, but the location is ideal.