joojoo: Try this review on cruise critic.com from Bekah, she gives a very good detail of some of the same ports. She did a similar itinerary in March. //boards.cruisecritic.com/showthread.php?t=510053&page=32
We are already set with our private excursions but one of the ones we are using is capritime.com for the Naples port: Amalfi coast,Sorrento,Positano and private boat ride around Capri and Blue Grotto. They have a 1-800# @ website and Rebecca may have others taking their tours that still need someone to share. Good luck.