Happy to help! That flying field is home to the Twin City Eagles Squadron flying club in Council Bluffs, IA. The club is still going strong and has been growing pretty steadily over the past few years. One member said he couldn't afford to fly there anymore, because his wife would drop him at the field with his helicopters and then head over to the Ameristar casino next door until he was done flying!
There's a gentleman in town who puts up a website called Metro R/C Flying that's kind of a clearing house for information on all of the clubs in the area:
http://metro********.com/
It's not the prettiest website, but it helps you see all of the events from all of the different clubs in the area on one site. The Lincoln Sky Knights are linked to from there as well.
I hear the flying is good in Texas, but if you ever end up back this way again, you can rest assured you'll have plenty of runways to choose from for takeoffs and landings.
Good luck, and feel free to post back here with any more questions!