Why not hire a driver for a day? Someone like JJ, out of
Welcome To Paradise Transportation, since I am sure you can make a deal to provide the vehicle if he provides the "out of the way" experience.
The guy is 100% reliable.
I think there is a guy called Wilson that still does something like this, but i hear he now has a bigger business...
The suggestion regarding the local ex-pats might be interesting. Drop in at Rocky's and ask if anyone feels like taking a trip into the mountains....
Places to go:
Jamao road to Cafeto or Molino restaurants.
The road from Gaspar Hernandez over to Tenares....explore the Cibao
Go west past POP, to Luperon and La Isabela. If you have a 4x4 cross the Bajabonica and visit Estero Hondo and Punta Rucia.
Alternative route: Go across the bridge at Imbert, and take a right towards Guananico-El Mamey-La Isabela-Estero Hondo...
have fun!!
HB