Spend a night in Palo Duro Canyon State Park and take in the show TEXAS that runs Tuesdays through Sundays in the summer at the Pioneer Amphitheater in the park. The family-friendly show has singing, dancing, fireworks and lots of Texas humor! Then head to Southern Colorado.
Take 16 west from I25 to Durango. Take the Durango Silverton Railroad and vist Mesa Verde National Park.
Then jog down to the Grand Canyon. On the way back home stop in Tombstone AZ.
Spend a night at Rusty"s RV Ranch in NM it is in dark sky country and your kids will see a night sky like they probably never have seen.