Park admission free. Film $2; $1 (ages 62+); free (ages 0-9). CD detailing a 3-hour self-guiding tour $12.95 (to purchase); $4.95 (to rent, with a $20 down payment).
Grounds daily dawn-dusk. Visitor center hours vary. Closed Jan. 1, Thanksgiving and Christmas. Phone ahead to confirm schedule. Allow 1 hour minimum.