text: The 2015 event, the first since the retirement of the Allman Brothers Band, was scheduled for April 16–18 and featured Widespread Panic, Gregg Allman, Gov't Mule, Earth, Wind & Fire, JJ Grey & Mofro, Cheap Trick, Jaimoe's Jasssz Band, Butch Trucks and Zappa Plays Zappa, Galatic, Hot Tuna Electric, Yonder Mountain String Band, Leftover Salmon, Dumpstaphunk, The Word and many other artists