We really enjoy Western Ohio, Amish country, with lovely handmade things/homemade things such as wooden items, jams, etc. This is a good time of year for produce from farmers markets, as well.
Same is true for shipshewanna, Indiana. Great cheeses, sausage, meats, bulk items at good prices and lots of handmade items at good prices. Pick up a brochure that tells you where things are on the side roads, such as weavers, and remember that everything is closed on Sunday's.
The Amish-Mennonite museum is also very interesting.
We loved sleeping bear dunes near traverse city, Michigan.
Should be a lovely time of year for your inaugural trip. Enjoy your airstream and travel safe.