No one can answer that question without a very good crystal ball. Keep in mind that you will have quarantine issues in two separate countries. to deal with. Current St. Vincent quarantine on arrival is 14 days, see https://www.caribjournal.com/2021/01/11/st-vincent-grenadines-travel-rules-tightens/. I think that this was recently tightened from a shorter time which could be done on the boat, but the only place you could go was Bequia, I suggest you talk with your charter company.

Were it me, I would look to re-schedule.