Located a short walk from the parking area, so technically this can't really be classified as a park-n-grab, but I'm still hoping they'll add a park-n-walk-n-grab (PnWnG) attribute.
You're looking for a green bison tube (BYOP) located along the fence line-- should be plenty far away from nosy muggles. So get out of the car and stretch your legs, then hit the road again, safe travels!!!