Yonder Mountain String Band’s 1:00 a.m. Saturday slot was a “who’s who” within the acoustic music scene. Early in the set, Lindsay Lou appeared for a cover of Jefferson Airplane’s “White Rabbit.” Busting into “Traffic Jam,” the group was joined by Larry Keel (guitar), Sierra Hull (mandolin), Jared Pool (mandolin), Ronnie McCoury (mandolin), Jason Carter (fiddle) and Alan Bartram (bass). Yonder’s mando phenom Jacob Joliff then found himself in the middle of Bill Monroe’s “Kentucky Mandolin,” trading licks with Hull, McCoury and Pool. Launching into a hilarious yet intricate version of Ween’s “Piss Up a Rope,” Yonder finished its set with renditions of “Fade to Black” (Metallica) and “Shakedown Street” (Grateful Dead).