Every recreational campground shall provide available unoccupied space of not less than twenty-four feet by sixty feet for each recreational camper or camp trailer, provided that such available unoccupied space shall not be construed to mean the space directly under any portion of any recreational camper or camp trailer. Recreational campers and camp trailers shall be arranged in rows abutting or facing a driveway or clear unoccupied space of not less than twenty-five feet in width and such space shall have unobstructed access to a public street or alley.