[motion]

I would stay away from anything east of Columbus, which includes Billings, Custer Battlefield, Sheridan, etc. Its 100 degrees these days (its gonna be a hot week), and the landscape is just rolling prairie. Try to stay off I-15. I know its fast, but you're just gonna miss all the charm of Montana rolling down the interstate from one big town to the next.

If you have something resembling a pickup, you can check out the wild horses in the Pryor Mountains. Access is via Pryor Mountain Road, just south of Bridger, in south central Montana. That's a nice day for the family. Beautiful country up around 10K feet at the top.