Hi & Welcome to Illinois
Here's website that may help some http://www.enjoyillinois.com/
While in Illinois I would reccomend Visiting the Shawnnee National Forrest in Southern IL
Rend Lake Resorts has 5 beuatiful Campgrounds and a 10000 acre lake ( If you stop try South Marcum Campground.
Arcola IL is home to Amish There are local shops and stores in the area most are closed on Sundays Rock home Gardens is here.
Champaign Urbana is home The University of Illinios
Springfield, Il is home Abbraham Lincoln & is our State Capital Here's some more info.http://www.visit-springfieldillinois.com/
Rantoul,IL is home to the Chanute Air Museum Has history of Chanute Airforce base and the the Town's History. There is a city campground close by.
Chicago is home of The Cubs and the White Sox and alos Navy Pier Sears Tower (which you can go up to the opservation deck and see the Sights over 110 stories) There also is Brookfield Zoo I would reccomend staying close to the outskirts and catching atrain ride into the city and catching a taxi to navy pier.
Indianapolis, IN which is home to the Indy 500 Which has a museum and you can take a ride around the track.Also There's A Childrens Zoo
Missouri has Branson MO Home to County Music, Alot of caverens St Louis is Home to the Cardinal's The Acrh (you can rede ti the top of it) A really nice Zoo And also they have a casino near by. Also you'll see the great Mississppi River. And there are the locks and dams near buy neat to see when a ship goes thru.
You may try googlimg for the state's websites and find more information on what all there's to do.
Also in Canton Ohio I believe there's the National Football Hall Of Fame. Wright-Pat air museum can take a day or two to look at everyting but is well worth looking at if you have time.
If you hit Rantoul, Il Let me know and I'll come out and say Hi Happy Trails & Have a safe trip