thanks to all for the great advice. Your personal experiences are a great help. I had not considered that the cleat on the foredeck might get ripped out.
So I will not leave the boat in Grenada and consider Trinidad (Peake) or Curacao (Curacao Marine), on the hard with tie downs. I am aware that they are not fully out of the hurricane zone, but the risk is much lower there.
Thanks Eamonn Washington Travel Bug Super Maramu #151 Currently in Grenada.