This took only a better part of the morning and left the whole afternoon free. However, it was not Chukka's. It was fun and entertaining. The bushman that climb the coconut tree and gives you lesson on all the fruit funny. Mixes in some great jokes. The ride you speak of does go through the ocean but I can not comment. No matter, you will have fun.
We did the zipline via Chukka and it was worth it. 9 lines at a cost of $105/person.