(1) In order to protect riparian vegetation, provide for stable streambanks, reduce erosion, and provide for nutrient barriers to protect the quality of rivers and streams, camping in a motor vehicle, as defined in 61-1-101, is discouraged within 25 feet of a river or stream in state parks and fishing access sites.
(2) The operation of an off-highway vehicle, as defined in 23-2-801, within state parks and fishing access sites is prohibited except:
(a) for administrative purposes; or
(b) as designated by the department on roads, trails, or specific areas.