Here are a few things in our area you may want to check out if you want to come to Iowa since you didn't get up here on your last visit. Our state fair is going on until August 23rd, and is ranked 6th in State Fairs in the USA.

Fair Dates - Iowa State Fair

The strategic air and space museum is in Ashland Nebraska and is definitely worth the drive.

Ashland, NE | Strategic Air & Space Museum

Since you're into Ag and equipment you could cruise over to Moline Illinois and check out the John Deere world head quarters and take a plant tour.

https://www.deere.com/en_US/corporat.../pavilion.page

I'm sure you're getting info over load now.