KRJ gives you the straight scoop. You really can't do much with just 5
days, but the Windward Islands offer some of the best cruising in the
Carribean, I feel. The itinerary laid out by krj is about the best you
can do. On the way down or up from Bequia, try to add St. Lucia's
primitive village of Sourfriere and the Pitons to the list, though you
can't linger anywhere.