I think a positive response from
boat owners is most likely, but contacting them could be challenging. I don't
recall that Anitgua had a morning cruisers forum on
VHF. If they do, then you could announce yourself. Otherwise,
Antigua has
charter boats (i.e. The Moorings and Sunsail). You might contact their offices and volunteer yourself for any folks that would appreciate your experience for that
passage. Those offices might see the value themselves in having someone aboard who can help so much.