What I've learned is that the car question is one of the most consequential decisions you'll make for your trip — and most travel guides give you a useless non-answer. So here's the real version, by region.

Travel by private yacht to visit Capri, Procida, Ischia, Sorrento, and the Amalfi Coast.

The Amalfi Coast is packed — so much so that local authorities now have to limit access to the coastal road. Yet, tourists repeatedly...