My family and I will be traveling on our first trip to Italy mid June 2020 through Rome. Age ranges vary from my 5 and 8 year old kids to my 70 year old mother in law (8-10 people total). We are starting in Rome (3 nights) going to Sorrento (4-5 nights) and heading to Avellino Campagnia region (2-3 nights) before making our way back to Rome. I am having a hard time thinking of when is the best time to get the rental cars. We have some plans to visit touristy places (Capri/Positano) and plan to use the ferry for these but like the freedom of the car to explore off the beaten path places.
Should we take a high speed train from Rome to Naples or Salerno to pick up the rental car?
Or train to Naples, ferry to Sorrento and then get the rental car?
I am trying to think of the easiest way with people, luggage, and a car seat.
Thanks