Hi,
Stick to the North Coast. I visited there and Punta Cana, Punta Cana is very isolated with few activities at most of the resorts. Do avoid Punta Cana Beach Resort at all costs, will be happy to share the many problems at that resort if you or anyone else sends me their email address.
An additional benefit is that the North Coast is a very worthy possible retirement destination. Local realtors can fill you in on the many advantages to living there. Do avoid the local Burger Kings, they are more expensive than in the US! Ocean water temp was 85 degrees in October on the North Coast.
Sosua is a charming little city, well worth exploring. Have a great trip.