Here are some local hotel options for your convenience, as well as the closest airport.
There will be a free shuttle available for the duration of the wedding day that will pick up/drop off within 10 miles of the wedding venue. No need to drive if you're planning on drinking. We'll have a built-in DD!
Flight
Indianapolis Airport
If you choose to fly in for the wedding, this is the closest airport to the venue. It is about 30 minutes away and if needed, they do have rental car places.
Hotel
Inn at DePauw
2 West Seminary Street, Greencastle, IN 46135
Hotel
Holiday Inn Express Cloverdale (Greencastle), an IHG Hotel