You have quite a few wonderful options on such a long trek. Before you reach Indianapolis, There is Cagles Mill Lake with electric hook-up campsites. John Bryan State Park is right after Dayton if you are still traveling on I-70. You can find the northeast shoreline of Lake Erie at Geneva State Park after you pass through Cleveland on I-90. Allegany and Burnham Point State Park might be the first sites you want to see in New York State. You do not want to miss the Adirondacks. There is so much to do there that I have linked the following site to help you decide on a destination should you decide to visit: http://bit.ly/cK0IIC

When you hit Vermont, the Mt. Mansfield State Forest greets you.

I hope I have given you some ideas for your trip. It sounds like you are going to have terrific trip!