I've never done it. We'd go out for public events, such as at local parks. Once we didn't figure out until Easter Day, and pickings were slim, but we found a park in a nearby city that was doing it. We've also gone to large events. The Dunsmuir-Hellman Estate in Oakland does one every year. They charge for it, but it's not that expensive and usually a much better experience than most free events. The estate is owned by the city of Oakland though, and the proceeds go to several charities.
I don't think they've done it in a while though.