Grounds and museum are free. Guided tour $10; free (ages 0-15).
Grounds daily dawn-dusk. Visitor center, house and museum open daily 9-5, Memorial Day-Labor Day; Wed.-Sun. 9-5, rest of year. Guided house tours depart every 30 minutes; ticket sales begin at 9 on a first-come, first-served basis. Closed Jan. 1, Thanksgiving and Christmas.