Hey @Piaa - happy to give any details you'd like about the whole trip! We booked all tours externally from the ship because they were really overpriced and not super interesting to us in some locations, and we were very happy we did. Specifically, we found out from another couple that at least the day we were there, they didn't take the ship tour to the real drift snorkeling spot in Taha'a and our tour did go to the real one. That was by far the best snorkeling I've ever done and of the trip, so I was very happy I booked separately.
For Huahine, we were going to rent a scooter but chickened out because we had an ATV incident earlier in the trip on Moorea. We rented ebikes from Europcar (where we had the reservation for the scooter). We circled the entire larger island on ebikes with stops in about 3 hours (rental was for 4 hours). We went clockwise and stopped briefly at the marae and fish traps, went over the bridge to the old Sofitel site and snorkeled/swam, went down to Faie and the blue eyed eels, up to the Beleverde where you can see the ship in the harbor, and back around to Fare stopping at a few other beach and pretty spots for pictures along the way. The ride was very easy other than walking the bike up the hill to the view point (steep but not very long to get up). Then, we dropped the bikes off and went over to the beach in Fare in front of the hotel and got some drinks from the pool bar and swam for the rest of our time until the taxi picked us back up. You could also walk around shops in town very easily from here or get lunch.
Had we had the scooter, we planned to go down to Avea bay, as well. Some other on the boat did the bike tour through Windstar that circled the smaller island and said they really enjoyed it if you want to stick with their offerings. However, I think it was $129 and we paid 5000xpf for the taxi plus 7800 xpf for the bikes, so our total for two was about $129 and we went more places. 🤷♀️
I would definitely recommend a light cardigan or shawl if you tend to get cold. It was very chilly in the dinning room and even on deck when it's windy, it could get cold. Our very last day when we were back on Moorea, we did a jet ski tour and got really cold in the water to the point everyone was shivering because the sun wasn't out. If you have a rash guard, I would bring that too for warmth in the water just in case.