Clair: If you have driven in the Dominican Republic for several weeks, months or years, you would know that driving here is a dangerous game. Not only are 50% of the drivers unlicensed, been drinking or are just plain stupid, you also have to deal with tinylittle motorcycles that think they are indestructable. That, plus the fact that the roads are not well marked (oh I can give you outstanding direction to just about anywhere in the north, but not by Route # or such.)and most are in poor condition.
You would be so much better advised for this first trip to take a taxi and eliminate aggravation. After you get a feel for things, THEN youcan decide which is better.
paradisetrans.com is a fine option and hundreds of DR1ers have used them.
There are other options too, such as buses but youlose a lot of time and you want to get to the beach, I know.
We have had this discussion time and time again, but the really wise thing is to taxi the first time...
Cordially,
HB