I have a trip report from a 2018 one way from St. Vincent to Grenada at:
http://www.traveltalkonline.com/ubb...o-grenada-jan-2-13-long.html#Post152856. To shorten the trip down from the Pitons, you can clear into SVG at Wallilabou and spend the night there, or motor the short distance to Keartons for the night. If you go there, call the Rock Side Cafe in advance as the last time we were there there were only 2 moorings to tie off to bow and stern. They will send people out to assist. You will also have many volunteers from Wallilabou offering help - wave them off and use the people the Cafe sends out. Dinner with Orlando and Rosi is very good. This will leave you about 3 hours sail to Bequia.