It's finally time to celebrate the arrival of summer festival season! But not to worry if you're missing out on the big-name fests this year: There'll be plenty of jamming-out just a few hours from the District. From the truly epic (think Beyoncé in Philly) to the small-but-charming (bluegrass in rural Virginia, anyone?), we've got the ultimate list. So, get your credit card handy — you're going to want a ticket, stat.