The once-and-future Festival Opera is back with their popular Opera in the Park concert. Not as crowded as the events put on by the S.F. Opera, this Walnut Creek event is still a big happening, with music, food, kids’ activities and a lot more. This year, Kristen Clayton, a fairly well-known soloist is headlining and Bryan Nies is conducting the orchestra. If you want a fair that features great music, look no further.