JD hit it on the nail--check out the cruise schedule and plan around that. But in general, by May, the cruise ship crowds are much less, as many ships are leaving for the Med or Alaska by then. Even in dead high season, there are really only a few places where you even need to worry about them. Sunset I would say is number 1. Do NOT go there before about 3 PM if there are several ships in. After 3 PM, they are basically all gone anyway. As far as town, 1 or 2 ships in town just makes the town seem not empty. As far as Orient, cruise ship people make almost no difference, except there are a few restaurants that have concessions to provide lunch as a part of an excursion. In general, plan your day however you want, as I see only one day for the whole month in which there are even three ships in.