Dawes, Blackberry Smoke, The Wood Brothers and Clay Cook are among the artists who've been added to the roster at the Nashville edition of the festival, which takes place Sept. 27-28. They join previously announced acts including Wille Nelson & The Family Band, Grace Potter and the Nocturnals, Edward Sharpe and the Magnetic Zeros, the Eli Young Band, Kacey Musgraves, John Fogerty, and Jason Mraz.

The second festival takes place Oct. 19-20 in Charleston, S.C., where Kenny Rogers, Natalie Maines, Fitz and The Tantrums, and Clare Bowen from the TV show Nashville are among the newly announced performers. They join a roster that already features Nelson, Musgraves, Band of Horses, The Head and the Heart, and Trombone Shorty.