Congratulations, I love playing festivals, it's the best way to check out other bands. I have a similar story. I had a band with my brother about 12 years ago. Really good band, made one record, got a nice write-up from a local critic, lasted a few years, played the Chicago Jazz Fesival side stage, and that was about it. Well, a couple years ago, my brother is reading the newspaper and sees the Chicago Jazz Festival line-up, and sees his name. Well, we kinda laughed it off assuming it was a mistake, buy my brother thought he should double check to make sure it was just a mistake, and sure enough, we were booked! We didn't ask for it, hadn't played together in 10 years, and they never asked us to do it, but we were booked. Crazy! Fortunately, we were all open, had a quick rehearsal, and had a great gig.