We plan to travel to Italy during late December. As such, we would like to enquire about the following questions. Appreciate your advice. - When we plan to travel from Roma Termini to Sorrento, we understand that we need to take a train to Napoli Centrale (~1hr 10mins), where we walk over to Circumvesuviana platform, then take a separate train to Sorrento. - Is the 2nd leg considered a regional train system? - When can we book the tickets? Or, should we consider an Italia Pass? - From Sorrento, how do we commute to Pompeii?