The best time ever,BottleRock.com in Napa,CA. Just finished a 4 day music festival. Including Jane's Addiction, Kings of Leon,Train,Flaming Lips,Cake,and Zack Brown Band. This was over mothers day weekend, so I sent a card and had great wine and food to die for (I didn't forget, lots of beer)
Next Year Dates May 9,10,11 2014. Book your hotel now! This was the first year for this festival and a contract has been signed for the next 4 years but don't know at this time on the music line-up.
Being a local,was worried about traffic flow but they had a excellent shuttle service in place.