Saturday Sunset Cruises. A leisurely three-hour boat tour to the Headgates and back is the perfect way to watch the changing of the leaves. Tours depart from Enterprise Mill, with a half hour stop at the dock near the headgates at Savannah Rapids before returning to the mill as the sun goes down. Departures each Saturday at 5:30 p.m. in September, 4:30 p.m in October and 3:00 p.m. in November. $21. $2 discount for students, seniors, military and dependents.