The in-lieu fishing sites are for the benefit of the Yakima, Umatilla, and Warm Springs Indian Tribes, and such other Columbia River Indians, if any, who had treaty fishing rights at locations inundated or destroyed by Bonneville Dam, to be used in accordance with treaty rights. The use of the sites is restricted to such Indians; however, this shall not preclude the use of camping areas on the sites by the families of such Indians.