Im about 30 minutes from Red Brush and was a member till last year. The 400-500 yard range is pretty nice with good overhead cover on the bays. You have to be a member unless its an open match. Redbrush.org has some info. Typically the range is limited to 400 yards but they can close a gate and open 500 for events. I shot a couple IDPA matches a few years ago. Keep in mind that the guys that came up with the IDPA stages don't know squat about tactics. If same or similar guys do the rifle matches, I'm glad I never shot with them.
And if you don't know, the running joke was that if you shoot over the rifle berm, your rounds will land in Kentucky. The range is just a few miles from the Ohio River/state line.
Welcome to the nuthouse!!