OK, this is the plan. The route is below.
All my friends think it's just fine to get an expensive flight to Des Moines, on a plane so small you can't bring your bike on it, and then spend a whole day riding a bus to the start town. Then at the end, you have to ride the bus all day back to Des Moines.
I decided this is not for me. I'm flying to Omaha, and touring to the start town. Then after RAGBRAI, I'm riding to Chicago and flying home from there.