If your in Utah check out Pow Mow. I've honestly had more powder days there then anywhere else due to how freaking huge it is and the general lack of people.
ha okay. well you said cali and utah.. for cali, squaw, alpine meadows, kirkwood, are some of the best (and there's plenty of intermediate/groomer stuff). utah i can't speak from experience on but of course alta and all those other mountains east of salt lake city are amazing