Refuge and visitor center free. Wildlife Drive $3 (per private vehicle); $1 (per pedestrian or bicyclist); free (federal interagency pass holders); $15-$25 (per commercial vehicle).
Refuge and Wildlife Drive open daily dawn-dusk. Visitor center open Mon.-Fri. 8-4, Sat.-Sun. 9-5; closed Thanksgiving and Christmas. Allow 1 hour minimum.