My traveling group is my husband and me, our girls (10 and 5), and my parents (healthy in their 70s) - our excursions were chosen with this in mind.
For Sicily, I am planning to do a
DCL MSN 02 because it goes to Taormina and hits the highlights I want. That said, it doesn't hit Mt. Etna which I know a lot of others on the cruise are going to.
For Athens, I booked a private tour with PrivateGreeceTours that does Athens (Acropolis) and Cape Sounion. The main advice i have seen is book private and get yourself to the Acropolis as quickly as possible before the crazy crowds arrive.
For Mykonos, they have just released the DCL options - there is one perfect for us that hits the highlights - MY26 is our choice.
For Santorini- I booked a 6 hour private tour with Kallisti.
For Naples, I highly recommend either Pompeii or Positano if you haven't been to that part of the world. We are actually likely going to keep this as a quiet day since we have traveled this part of Italy many times.
Would love to hear your plans too!!