I'll be there for Old 97's, who, by the way, are playing at 8PM, not 8:30 as erroneously written on the artscape website.
I've seen the Avett Brothers, and they sucked big time. Not trying to be comtrary, just calling it the way I saw it. Imagine the the Iron and Wine guy screaming like a chicken with his head cut off while playing amateurish bluegrass, and you get an idea of the unpretty picture!