Govt Mule & Warren Haynes band are slated to join Further, the Black Crowes, Zac Brown, the String Cheese Incident, Widespread Panic, and John Fogerty as a part of the inaugural Interlocken Music Festival lineup. This is fantastic because (more than likely) Warren will pop up and sit in with a bunch of bands, which is highly speculated of other musicians as well. You can find more information about this terrific, old school-spirited festival by visiting the official website.