Leaving Labor Day....best to hit as many National Parks up North first before weather keeps you out...Glacier, Yellowstone and Grand Tetons would be my first thought. Wow, so many things to see and do...Mount Rushmore, The Badlands, The Sturgis motorcycle rally will be over but its still worth a look. It seems campground wise, that if you find an area you want to spend some time in, then reservations may be in order...on the other hand, your traveling after school is back in session and the weather is cooling, so availability for sites without reservations would be favorable. I think I'd wing it!
You can do your research on down days of your trip for upcoming towns, cities, states depending on your route...I guess that means internet access via cell phone or Wi-fi. Easy enough to check each states highlights by doing a google search. I'd also suggest traveling some of the back roads as long as you have proper maps/GPS telling of restrictions on certain roads. Stay off the Brooklyn Bridge in New York and the Parkways....don't ask why I know! Sounds like a Great trip...have room for me? LOL
96 Vogue Prima Vista
The Kid's: Humphrie, the Mini Schnauzer and Georgie,wire haired dachshund.
Rainbow Bridge: Laddie,Scoutie,Katie,Cooper,Kodie,Rubie,Maggie, Cassie, Mollie, Elvis, Potter and Rosie Love You! (40+ years in all)