Hi Nitteo
I was in Moorea about 6 weeks ago for a week. I dived with Bathy's Club which is located at the Intercon Hotel. They were pretty good. The pattern was two dives in the morning - with a return to the dock between dives - and one Try-A-Dive trip in the afternoon. Dives were 45 minutes in the 50'-80' range: blacktips and grey reef sharks were everywhere; and, something I have never seen before, reef fish followed us as we cruised along. I found a 60mm macro and a 12-24mm lens the best.
I was travelling with over 60kgs of baggage and had no problems at all either with Air Tahiti Nui, who I used to get to and from Tahiti; or with Air Moorea who I used for the 5 minute hop from Tahiti to Moorea.
Black pearls: yep, bought those - well I had to do something to try and sooth my bride who was back at the ranch. Expensive things they are too (pearls and brides). You can buy them free of local taxes provided you get the invoice stamped by Customs at Tahiti airport on departure - and mail it back to the store.
What is there to do: errrr, not a lot. Moorea was a VERY quiet place with most of it in darkness by 8pm. Some nights I was the only guest at the resort. Diving, reading, snoozing and eating was about it.
One fun thing was to rent a two-seater "Bugster", something like a go-kart which you could use to zip around the island - takes about 90 minutes.
I've written up some of this in my trip report (Round The World Dive Trip) which is on this forum. Let me know if you want to know anything else.
And enjoy your honeymoon! Congratulations - I hope you will both be very happy.