Look for a window where you have a north component to the wind
and go as btrayfors has suggested. It's about 80nm.
If you want to go into the lagoon
, it is most inexpensively done by checking in on the French side, therefore I might suggest arriving to Marigot Bay and waiting for the bridge to open on that side. After you are through and find a comfy spot to anchor
to the Marina/shop/restaurant area in Marigot in the lagoon
. The marina office is where you can check in. Ask another cruiser once you're there for more specifics.