Last night, Bob Weir and RatDog headlined Missoula , MT’s Wilma Theater. The group opened the night without Weir on “Don’t Let Go,” “Rock Your Papa” and “Walk Through the Fire,” though the guitarist emerged partway through “Easy Wind.” The surprises continued second set when area-resident Huey Lewis emerged to play harmonica on a set-opening “K.C. Moan.” Lewis remained onstage for the band’s entire second set and encore: “Fever,” “Friend of the Devil,” “Good Morning Little Schoolgirl,” “Tennessee Jed,” “Come Together,” “China Cat Sunflower,” “I Know You Rider” and “U.S. Blues.” Lewis has a longstanding relationship with the members of the Grateful Dead and the Bay Area music scene in general. Some of his most memorable collaborations with the Grateful Dead included jam sessions at the 1988 Bay Area Music Awards and a 1993 show at the University of Oregon. RatDog guitarist Mark Karan has also worked with the 1980s hit-making singer.