We have a few Airbnb stay options in Washington that would be perfect for the weekend!
Anyone who has a camper (or wants to rent one) and would like to pull it into the fairgrounds camping lot is welcome! It is about $10-$20 per night and has hookups. This will be on the same property as the reception so just a short drunken walk across the property and you are there!
Don't let the local talk scare you away from booking this motel. It has recently changed owners and the reviews are great!
I wouldn't say this is the best option, but if you just need a bed to sleep in that night it's perfect!
If you have a DD there are several hotels in the Iowa City/Coralville area that are about a 35 min drive!