Dave Matthews Band

Warren Haynes joined the Dave Matthews Band at Bonnaroo 2005, which also boasted Modest Mouse, the Mars Volta and Jack Johnson, who told RS, "It has the vibe. Not just for the fans, but also for the bands. Backstage is exactly how I would have dreamed these festivals would be: musicians sitting around showing each other songs, watching each others' sets from the side of the stage."

• Rolling Stone's Essential Bonnaroo Coverage