On May 27 the Ft. Harmar outdoor range near Marietta, Ohio is having its Historical Military Gun Match and IDPA. No cost to watch. Some really cool HKs tend to show up at these events. It's like a smaller version of Knob Creek. Maps on their website - Fort Harmar Rifle Club Marietta, Ohio
I've been a member of this range for years and I think it is an absolute jewel.