Nobody on the road. Nobody on the beach. The summer is winding down in a series of BBQ bashes, pool closings and lingering Labor Day hangovers, and it's taking some of the year's best-attended tours with it. As one concert season dies, though, another is reborn. Behold: the rise of a music-packed autumn, filled with enough country tours and festivals to give the warmer months a run for their money. Bring on the falling leaves.