Port la Royale probably won't have a dock
space for a '45 cat open during season, but they have a large number of moorings where you'd go fore-and-aft and be only a couple of hundred feet by dinghy
from the docks. Friends of mine spent a long time there and liked it. During the day there's a fair amount of dinghy
traffic (less bothersome to a cat than a monohull) but at night it will be fine. Clearing in and out of the French side is done at the Capitainerie there.
The other marina in Marigot is on the outside of the bridge, Marina Fort Louis, and they will have space for a '45 cat somewhere between the eclectic mix of megayachts and sailboats at the docks. The prices aren't cheap
, but aren't too bad. It is just a short hop to the centre-ville from there.
I have to admit that I spend a lot of time anchored just outside of the breakwater of that marina and sometimes, when the wind
is howling, I'd prefer to be on the inside.