The joy that the late TV legend Huell Howser shared with generations of Californians infuses a new permanent exhibit, “That’s Amazing! Thirty Years of Huell Howser and California’s Gold,” sponsored by the Automobile Club of Southern California and housed in Chapman University’s Leatherby Libraries. The public is invited to an open house launching the new exhibit on Saturday, March 29 on the Chapman campus in Orange, from 9 a.m. to 6 p.m. The event will also mark the world premiere of a new documentary film, also sponsored by the Auto Club: “A Golden State of Mind: The Storytelling Genius of Huell Howser,” created by Chapman film professor Jeff Swimmer, which will be screened four times in Chapman’s Memorial Hall during the open house event.