The next couple of days we played in the sizeable Rade di Portferraio. At the eastern end are a couple of bays where you can anchor, notably Ottone, which has the little strip of beach and a hotel bar where you can buy a drink and admire your boat gracing the scene. Dense vegetation circles the bay: pines, bamboos, cane and palms.
Just north of this is Cala Bagnaia. This is marked in the pilot book as an anchorage, but is no longer accessible. The Port Authority guidance clearly excludes it, and there are no boats anchored there. Close in there are some small mooring buoys, and there are lots of dinghies, but anchoring is now off limits. This is understandable as it is small and would get incredibly crowded in summer, but a shame as a lifeguard told us that it is always calm in there.