Hi Barbara,
I haven't sailed on the PG but recently finished a Voyager cruise that traveled through French Polynesia. Wendy is right, you don't have to be a water person to enjoy yourself. Although we did enjoy a snorkeling excursion, we also took several jeep tours.
You say that you like to relax? Then you are going to the right place. Sitting on deck (or a balcony if your cabin has one) watching the water go by or reading or napping, it's all heavenly. Good luck on your decision.
