This is not quite right.
The enabling law ;
The stated purpose of the newly created ONSR was: For the purpose of conservation and interpreting unique scenic and other natural values and objects of historic interest, including preservation of portions of the Current River and Jacks Fork River in mo. as free flowing streams, preservation of springs and caves, management of wildlife, and provisions for use and enjoyment of the outdoor recreation resources thereof by the people of the United States...
Recreational use is equal priority with all other purposes.