just booked RS 10days Venice, Florence, Rome

Not much experience with Pisa, but with Venice and Rome, it's easy. These cities need to be explored, whether it be the Spanish steps, or the Basilica St. Marco. Rome has the best gelato and amazing piazzas. Venice is an explorer's city- find amazing nooks and crannies, as well as dried fruit and Limóncello. Follow Rick's advice for getting into the main sites, otherwise, be brave and explo on your own.
Have a great trip!
We will be there in June-July:)

I don't know what's on the tour, but Torcello is one of my favorite places when I'm in Venezia. Your tour guide will have plenty of suggestions.

I recently downsized to the RS 20" rolling carryon, like it a lot.

And what will you do if your flight to Venice is delayed by more than 24 hours? It's a very real possibility these days with fewer flights and the existing flights booked to the gills. You left very little buffer time between arrival into Venice and departure on your tour.

I hope that you won't have any significant flight delays, but if you do, then you can use Travel Guard staff to send a message to the guide at the hotel, or help with flight issues and baggage delays. On the first evening, the group has an important getting-acquainted meeting, as well as dinner together, but if you miss those, the guide will be reachable.

The vast majority of guides and tour members use Rick's Rolling Carry On as their primary luggage. However, even with wheels, you still must pack light so you can handle your bag on stairs (common for Venice bridges, European train stations, and in some hotels) and other situations. A backpack is easier to carry in those instances, however, most people choose and get used to a bag in one style or the other, not convertible.

From Florence to Pisa, direct trains run almost hourly and take about 1hr20min to Pisa San Rossore station. See the location of this station described on p. 569 of Rick's Italy book. It is not the Pisa Centrale station, which is marked on the map but further away (trains to/from Pisa Centrale run more often, if you prefer). Buy tickets in the train station and validate (date-stamp) them in the box before entering the track area.

In Florence, my favorite sites not covered with the group include the Medici Chapel, San Marco Monastery Museum, and Galileo Science museum.

If you do decide to go to Pisa, it is an easy walk from the train station to the Leaning Tower. Reservations highly recommended, you can do this online. Also, no bags are allowed up the Tower, there is a building located on the premises that you can put your bags in a locker. The line for this can be long.
Enjoy.

Love the RS Euro bag as a personal item with your roller bag. It attaches to any roller bag so does not slip off when you are going from place to place. It also has a shoulder strap to carry separately. It opens up wide so easier to get to things on the plane or train, than how everything falls to the bottom of a back pack. Look it up on the website. We have Eagle Creek Roller carry on's and it fits on those and our friends have the RS roller bag with the RS Euro bag. Check it out.

In both Venice and Florence there is more than enough to see and do to fill that free time.

Thank you all! Your responses are much appreciated.