On May 5 and 6, Widespread Panic will headline both nights of the first-ever Trondossa Festival at Riverfront Park in North Charleston, SC.Panic will share the bill with country renegade Sturgill Simpson (who will also play two sets), Margo Price, Moon Taxi, Hiss Golden Messenger and Big Something.One-day and two-day passes for Trondossa Festival will go on sale Friday Feb. 23 at 10 a.m. ET…