If you plan to visit more than one site or museum in Campania or Naples you can save by purchasing a cumulative ticket or the Art Card.
If you want to reach Pompeii, Herculaneum and Oplontis by train you can check the timetable here. The line connecting Naples to Pompeii and Herculanem is Napoli-Sorrento
If you have your luggage with you when you go to Pompeii you can leave it close to the ticket office. Here you can find all the informations about Pompeii, Herculaneum and Oplonti
