There's a bunch of IDPA clubs in Iowa, I'm the match director the the Black Hawk Pistol Club's IDPA branch:
There's also a ton of USPSA clubs around.
Where abouts are you?
There's a number of other clubs that aren't "affiliated" that put on a good match.
I'm subscribing to this thread, so if you reply back I'll hop back on and try and help you out. You've got some time before the season starts back up in full swing in 2013, but there's a couple of groups that do some shoots during the winter.