Rent a car, it's pretty fun driving on the left side of the road on these crappy one lane roads through the island.

We did a zipline (fun, but the same as all other ziplines), a one day island excursion at which point we went power snorkeling (which is amazing, snorkeling where you never get tired), and a hot spring where you cover your body in mud then wash it off in the hot water which was fun and unique.

Momi Bay is pretty far (20~ minute drive) from most things in the island but it was beautiful and had the best breakfast I've ever had at a hotel. 5 days was perfect for me