Well, when you are coming across Indiana on I-70, you might as well just keep the pedal to the metal and truck right on through. Unless there's something significant you want to see along I-70 in Indiana, you're going to find it a pretty dull part of your journey. I'm trying to think up some kind of attraction you might consider on that stretch of road, and actually, I can't think of a single thing, unless you decide to stop and see something in Indianapolis. The only campgrounds along I-70 in Indiana I know of are the 2 KOA's. One just East of Indianapolis and the other at Richmond, Indiana. Any other campground and you'll need to venture off the interstate some. Lots and lots of interesting things in the Southern part of the state, and lots of stuff in the Northern part (lots of Amish), but central Indiana???? dull as green brass!
Once you get East of Ohio, the trip should be VERY interesting! You'll love the New England states, and the East coast states!