How many people in your family group? If several, sometimes it is more economical, and more personal and flexible, to arrange for a private tour with a good guide, than to pay for several people to participate in a small group tour. Also, if your family includes younger children, a good private guide can probably adapt the tour for the kid(s), likely better than a group tour can adapt. That said, Walks of Italy, Context Tours and various other companies offer excellent tours of major sites and neighborhoods in Rome, Florence and Venice. You should check out their web sites, which are usually excellent. I believe Walks of Italy offers a discount to RS readers, if you mention that, and may also offer a discount for multiple tours or family groups booking for several people. Many major sites offer their own guided tours in English, and/or good audio tours. Do you have the most current RS Italy guidebook? It includes a huge amount of helpful information, including about tour companies and recommended private guides, and about offerings at major sites. RS also has many free audio tours that you can download to your phones or tablets. Often hotels or even B & B’s can book tours for their guests, but not always the best, and as mentioned the most popular tours and sites can sell out well in advance, thus not be available once you reach your lodging.