NE Ohio to Glacier NP

I would agree to stay away from Chicago. Depending on which way you go, I would suggest a few stops and a few campgrounds. Custer State Park is very nice. You can stay right in the Park.They have several campgrounds some with electric hookups. Check out the visitor centers and do the Wildlife Loop and Iron Mountain Highway.Mt Rushmore is close by. If you happen to come back via I-80 and I-70,about 10 miles south of I-80 in Nebraska is the town of Minden. If you like history,old cars,tracks,motorcycles,snowmobiles,tractors etc,you'll love this place. They have a campground there,but it's not the greatest.So if you don't want to stay in the campground,there is plenty of parking on the street for RVs. Waubonsie State Park is about 10 miles east of Nebraska City off I-29.$16 a night for electric hookups. Nice bath houses and dump station. As someone else mentioned, Missouri Rt 36 is a great alternative to I-70 across Missouri. 4 lane 65mph.There are 2 Missouri State Parks along that Route. We stayed at Pershing. $19 a night for electric hookups. Nice bath houses and dump station. The other one is Long Branch State park.