David Cain, impersonating hunter John Colter, talks with visitors at the mouth of American Creek during a 2001 visit by the Lewis and Clark Discovery Expedition of St. Charles, Missouri. The organization uses a replica 55-foot keelboat to travel the river, stopping to offer tours and educational discussions. "There's nothing better than floating this great river in the same fashion as our forefathers," says Cain. "It's an experience everyone should have."