How often does the train from Civitavecchia to Rome and then back to Civitavrcchia run? Does it run 24 hours a day? How far from the cruise dock is the train station and is it a safe walk? Where does it drop you off in Rome? Do you need reservations or can you be assured of getting on board? How long does it take and how much is it? I know these are a lot of questions, but when I googled it the sites seemed unclear to me. First hand experience is always better. THANKS!