If this is a lengthy vacation i would go to Santo Domingo from Jarabacoa then head to Sosua from SD. Jarabacoa to Santo Domingo direct with one stop in La Vega on Caribe Tours. Instead of Caribe Tours i would use Metro bus Santo Domingo to Sosua.
It is a 10 day stay for one of us and the other is living in Jarabacoa.Was just looking into arriving in Punta Cana and meeting in Santo Domingo for the weekend then heading back to Jarabacoa for part of the week before heading to Sosua/Cabarete. Says it would be approximately 2 hours drive but the bus says 3 hours and have to get to the bus. Santo Domingo airport is not an option since need to go with WestJet from Canada.