The port expects 64 cruise ship visits this year, bringing an estimated €14m into the city, while Old Quay residents want a cap on the number of ships on a single day.
The two hill towns are restricting access to residents, deliveries and emergency vehicles, and visitors will park outside the walls and walk or take an electric shuttle.
Small hotels and guesthouses around Greyling Bay report a rise in out-of-season bookings after joining forces to sell guided walks, cookery sessions and harbour suppers as short-break packages.
