In Italy, I have always used regional trains, they are inexpensive and more convenient than buses, for example, the presence of a toilet, which is important. There have never been any problems with buying tickets on the day of departure, I don’t buy in advance, because it’s not known what the weather, mood, etc. will be like? Just keep in mind that the schedule in Italy is observed very approximately and do not forget to validate the ticket before boarding, on regional trains the ticket does not ... Farther...