Mark,
Been there several times, grew up on Columbus Junction. Great Adult rally, lots of entertainment, cold brew and fun times. $35 if you get tickets now, or $40 at gate. No fights or hassles, the club keeps a tight leash on everyone.

Camping is available on site and the Thirsty Camel serves food along with several vendors. Make sure to visit the Grandview Lion's Club Lemonade stand, my sister and brother-in-law run it. It's their main fundraiser. Since the floods, no local hotel or gas stations. Closest is south of CJ in Columbus City or North to Nichols. My brother and I will be there Friday - Sunday with some friends, look out for "Teachers Gone Wild" lol. If you have any more specific questions, give me shout.
Larks