Haiti is a tiny country. If there were developed infastructure you could zip around the entire country in no time. All of the maps we find on-line do a poor job of listing very many cities and there are no villages listed.
The closest town on the map below is Arcahaie. From LaDigue we can be there in about 20 or 25 minutes. After Arcahaie you go North another mile or two, then turn right and head towards the Matthieux mountain range. We are almost directly in the middle of St.Marc and Port au Prince. Port is a little closer. We are about three miles off the ocean, we can look out off our porch and see the South East half of the little island, La Gonave ... it is sitting straight out in front of us.