Grounds open daily dawn-11 p.m. Rangers are at the sites daily. Ranger programs are offered daily in summer. American Camp Visitor Center open daily 8:30-5, early June-early Sept.; daily 8:30-4:30, early Sept.-early Oct.; Wed.-Sun. 8:30-4:30, rest of year. American Camp Visitor Center closed Jan. 1, Thanksgiving and Christmas. English Camp Visitor Center open daily 9-5, early June-early Sept.