I am taking a 10 days guided land tour to Croatia and the Adriatic Sea from Venice.
I am considering to take the opportunity to visit Cinque Terre and Tuscany and would like some advice.
Proposed Travel Plan:
Fly to Florence for 3 days and do local days trips to Cinque Terre and Tuscany separately.
From Florence, take a train to Venice for my land tour to Croatia.
Questions
Are the sights in Cinque Terre and Tuscany completely different from the towns covered in my Adriatic Sea guided tour to be worth my while to do a top in Florence.
Is early May a good time to visit these two places?
Any different between standard and premium class train from Florence Santa Maria Novella station to Venice Mestre station?
Is it convenient to bring a checked in luggage onboard the train?