Home Jambase Widespread Panic & Trey Anastasio Band To Headline 2017 SweetWater 420 FestNational Music NewsJambaseMusicWidespread Panic & Trey Anastasio Band To Headline 2017 SweetWater 420 FestSeptember 20, 20161449FacebookTwitterPinterestWhatsApp The initial roster of acts have been confirmed for the event held at Atlanta’s Centennial Olympic Park on April 21 – 23.