Many of these suggestions feature the Great Outdoors; but there are some Great Indoors also, such as the many indoor waterparks of Wisconsin Dells.
OH: Heartland Country Resort- luxury B&B in Ohio features horse-riding OH: Cedar Point - roller coaster capital of the world WI: Wisconsin Dells Waterparks: private resorts have an amazing array of indoor waterparks; in summer, many open outdoor waterparks too. IN: Holiday World - family theme park plus water park WY: Yellowstone National Park- awesome destination Yellowstone: multiday summer program for families- through the Yellowstone Assoc'n Institute Yellowstone Family Adventure -escorted tour
CO: Colorado dude ranches CO: YMCA of the Rockies - a top "family camp" with lodge, cabins, activities
NM: Taos: rafting, hot-air balloons; pow-wow; pueblo NM: Hyatt Regency Tamaya Resort & Spa -500 acres on Santa Ana Pueblo; horse-riding, cultural activities, Camp Hyatt for kids
Utah: Bryce Canyon National Park - otherworldly beauty; hiking, horseback riding, stargazing, interpretive programs... AZ: Pointe South Mountain Resort- with waterpark NV: Houseboat Rentals on Lake Mead - luxury style TX: Barton Creek Resort & Spa - 4000 acres in rolling hills near Austin; lots of recreation near by TX: Fossil Rim Wildlife Center and Lodge
Dude Ranches in Montana, Wyoming, Idaho, and more - continue to Western US States