I'd rather start the day with a couple of espresso and a zeppole in Naples, rent a gommone and go snorkeling or diving, go to the old city for true Neapolitan pizza, and then finish the evening watching a concert at Ravello. Would be a lot cheaper, and amazing.
I’d be content walking the ruins of Herculaneum, followed by the pizza di Napoli you’ve already described.
CC