My family are from the Campania region so I always recommend this - Naples, Salerno, Amalfi Coast, Pompeii, Herculaneum, Paestum, Agropoli plus the Neapolitan islands - Capri, Ischia and Procida.
Capri is pricey, Ischia is nicer plus get a stop off for the smaller Procida where my uncle and...