She is best known for originating the idea for the historical outdoor drama, Texas, and facilitating both its creation and the Pioneer Amphitheater where it is performed in Palo Duro Canyon.
[1] In July 1960, Harper was inspired to create an outdoor musical using the Palo Duro Canyon as the place for the performance.
[6] She founded an organization in 1961, the Texas Panhandle Heritage Foundation Incorporated, which eventually built the Pioneer Amphitheater located in Palo Duro Canyon.
[7][8] Harper contacted playwright, Paul Green, to see if he would be interested in writing a symphonic drama about the Texas Panhandle.
[10] Harper was honored with the creation of a bronze bust in her likeness, sculpted by Jack King Hill, that was installed in the Pioneer Amphitheater in 1980.