You will do as you like but hold on till you get to LP and talk to other ARC
crews. We are here and I do not see very many of them taking on any extra fuel
. I think vast majority of them just fill up their tank and off they go.
If you take much extra fuel
you will be heavier and sail slower. This is contrary to what you want to achieve both in respect of getting there sooner and in safety
On our last crossing of the same waters (2013) we used maybe 5 liters of diesel
. Our boat
is way slower and way less efficient a sailor than yours.
If you do want to cut down the sea time, let Air France
worry about all fueling. You can get to St Lucia
in a couple of hours, from Charles de Gaulle.