If you go to Guilia's Cafe across the street from Playa Real Resort,
there is a tour company (sorry I don't recall the name - just a touch of Alzheimer's
) that would be happy to book you a tour to Catalina Island, Whale watching in Samana or a trip to Saona Island! I wouldn't recommend the "safari/jungle tours" this year due to all the rain during hurricane season but the other tours are fine (we've been to Catalina already several times this year!).
There's also JR Tours on the same street but closer to La Capella Resort that offers the same tours.
We've taken all of them and always been pleased (yes we have gone more than once when we've had visitors staying with us in Juan Dolio).
A daytime city tour to Santo Domingo to see the colonial city is also a good idea altho' this one is easy to do on your own just by catching the guagua (bus) anywhere along the highway. A nighttime tour to see the "Faro di Colon" (Columbus Lighthouse) is also pleasant and usually includes a stop at Guacara Taino (the underground disco) and sometimes a dinner at a local "hotspot" in Santo Domingo.
Hop a bus to Boca Chica during the day and visit the gorgeous beach there and browse the gift shops for those necessary souvenir purchases!
Most of all enjoy your stay and let us know about your trip when you get back home!! :glasses: