The second annual Festival La Onda by BottleRock is in the books, drawing tens of thousands of fans to the Napa Valley Expo in downtown Napa to witness dozens of cool Latin music acts perform on Saturday and Sunday. Organizers triumphed over adversity — including the last-minute cancellation of one of the headlining acts, the fan favorite Grupo Firme, due to visa issues — and solidified La Onda’s place as the Latin music party to beat in Northern California.