I don''t have enough experience at Block to say if there''s ever a time when you can get a slip and not have someone else (or two or three) tied up to you. I''d called in advance and was told a reservation wasn''t necessary, but when I got there, found that reservations weren''t needed because they have mastered the art of fitting as many boats as possible into tiny places. But there''s plenty of good anchorage available in New Harbor, and for $2 bucks or so you can get picked up by the harbor water taxi; or take a dinghy. Old Harbor right in front of the town might be worth checking out too--saw very few boats in there, but coming and going might be more exciting than you''d like. I took some pictures of the anchorage that you can find in my article here about returning from BI, and there is a Web camera overlooking New Harbor that you can use to check out conditions from www.blockisland.com, although it seems to be out of commission right now.