Just had a thought - wouldnt really recommend any of the trips that you will be offered, they are a waste of money. The DR is basically designed to rip off the Americans and everything is over priced accordingly. If you need any thing you can buy it for a 1/4 of the price outside of the hotel grounds.....but if you venture out of the hotel make sure you are with your other half!
Enjoy your holiday - it is beautiful and very relaxing and the food is gorgeous, especially so if you are a lover of seafood! Do you know what hotel you are going to?