Take a Windbreaker for in case, Some finger Snacks on the boat, Samosas and small pastry pies did it for me and Ginger-ale if you suspect you might have light ocean sickness it helps allot taking off the edge, the ginger that is :) But all in all Make sure you go with the right Charter. If you want a big boat and just cruise along DONT book Michelle Charters! Michelle Charters is a dedicated fishing boat on which you will catch fish so dont wear your fancies on the boat you would most probably end up staining them with fish slime!