Six of us will be travelling from Rome Airport to Florence, having lunch and a quick tour of the city, then travelling on to Venice on 8 May (a Sunday). We have purchased Saver Railpasses (for better or worse) and so require train reservations. We will be arriving at about 6 am and hope to get to Florence at around 10 am and leave for Venice around 2 pm.
I am wondering if we need to reserve our seats before we leave home and thus have to lock into a particular train departure or whether we could leave the seat reservations til we get to the rail station at the airport or even Termini.
I am, of course, concerned that there will be no seats available and we have to sit at Termini.
I would appreciate any advice.