If you google it, there's a webpage that shows membership fees and all that jazz. GIRS has their own website but I don't think Eastern Iowa Aquatics does. As far as I know GIRS is based out of Waterloo but they usually have meetings down here in Iowa City.
I used to breed bettas about 15 or so years back in Des Moines, I remember meeting some guy in Aqualand when that was really the only show in town who bred them too but don't know if it's the same guy he sold me quite a few really awesome bettas though, I remember that. (and I agree it's horrid the owner thinks he knows so much and can be quite rude.)