There are two seminal works that give a complete history of the Jewish settlers, their often terrifying journey to get to the DR, the horrific conditions they faced when they arrived, and the astonishing success they made in building lives here. The books are "Tropical Zion" by Allen Wells and "Dominican Haven" by Marion A. Kaplan. There are several other first person accounts, but they remain unpublished.
While Trujillo offered visas to 100,000 Jews at the Evian Conference of 1938, the fact of the matter was that by 1938 there were not 100,000 Jews who could get out, having been stripped of their businesses, bank accounts, and passports. The 700 +/- who did make it endured tremendous hardship in getting to Lisbon to board the ship and faced the constant threat of deportation along the way.
When the war ended and the settlers could get visas to go to the US, and of course, once Israel was founded, most left. They were not farmers; they were dentists and carpenters and teachers, etc., and although they made "40 acres and a mule" work for them, they were educated, urban people who wanted a better education and a more sophisticated life than was available in the DR. Don't forget that there was also a smaller community in Santo Domingo, and a late influx of refugees from Shanghai.
Only a few families stayed; Trujillo had allowed single men to emigrate but not single women, so many intermarried. Earlier this year, the community celebrated the 75th anniversary of its establishment, and approximately 65 people attended. They are now in their late 60s and 70s, as they are the children of original settlers. I was privileged to be invited to join the group on a tour around Sosua and it was fascinating to hear their memories and to see where the bowling alley was, and where the various settlers' houses once stood (and some still stand), etc.
The synagogue offers services very rarely; siddurim are available in Hebrew only or Hebrew-Spanish. There are one or two in Hebrew-English and they are Art Scroll. However, services are decidedly not Orthodox. They're not really Conservative or Reform, either. The cemetery is closed as a precaution against vandalism, and it is always closed on the Sabbath and holidays.