To Omaha, and back south on I-29? There's a couple you might want to hit that way too.
About halfway between Omaha and Des Moines head south at exit 60 (US-6/71) and follow US-6 to Atlantic, IA and hit Sunnyside Park. I was there last week and only got seven holes in before it started raining on me.
http://www.dgcoursereview.com/course.php?id=3112
Continue west on US-6 or reconnect with I-80 to Council Bluffs. Just west of the interchange on US-6 is Iowa Western Community College and Treasure Cove DGC. Note: The current layout isn't like the one described in the pictures on that page.
http://www.dgcoursereview.com/course.php?id=835
If you're continuing west through Omaha, get off at either 60th or 72nd Street and go south to Harrison and head to Seymour Smith Park. Warning, it is often crowded.
http://www.dgcoursereview.com/course.php?id=428
I'm pretty well acquainted with Eastern Nebraska too, so let me know if you're traveling through there.