Miscellaneous: Since you'll be traveling internationally, stop at the duty free shop and pick up a bottle of duty free liquor. Each traveler can have up to 1 liter and depending on where you stay mixed drinks can be around 2000 francs (> $20).
Moorea is pretty hot, so you will want light clothing and beach wear. For the evenings, you may want long sleeved shirts and trousers to keep the mosquitos and other biting insects off.
Toiletries and Medical Supplies: Mosquito repellent. The mosquitos are VICIOUS in Moorea. You do not want to get bitten, so take protection. There are also mosquitos that bite there during daylight, so wear repellent all day, not just in the evening.
Photo Equipment: Bring plenty of film/memory cards as you will not want to pay the exorbitant prices in Moorea. If bringing film, 100ASA is good for daytime as it tends to be very bright. If you are going to go to an evening show, take 400-1600ASA to avoid as much camera shake as possible.
Miscellaneous: Moorea is very expensive for everything, so without going over your weight limit on your flight, try and take everything you will need with you, as you won't want to buy too much stuff there when you see the prices!
BTW, this photo was borrowed from a web site selling Mosquito repellent!
You really don't need to bring much to Moorea in terms of clothing. I found I wore a bathing suit most of the time and didn't find the need to get dressed up very often (it's rather casual). I would recommend bringing a sweater though because (especially during their winter months, June, July, August) it can get pretty breezy at night. Also, the over water bungalows that are furthest into the water get especially breezy on the windy days and I found I needed a sweater or long sleeved shirt during the day if I was in the shade.
Lastly, I only brought flip flops and running shoes which was a mistake. Next time I'd bring some water shoes or shoes that are water proof but will stay on when walking on rocks, etc. (i.e. Teva's or something like that). We took a walk along the beach and in some places it gets very rocky.
Photo Equipment: Bring a dispoable under water camera with you. After your first swim in the ocean with snorkel gear you'll want to run out and buy a camera. The under water cameras at our hotel were almost $40US. As embarrassing as it is, we did buy one...the fish were just so amazing!
Loose-fitting clothing (cotton is best), open-toed sandals. Be sure to include aqua socks or protective footgear for walking on the coral reef and in the lagoon. Along with a hat, don't forget to pack a good pair of sunglasses
Toiletries and Medical Supplies: Bring a good sunscreen and insect repellent
Photo Equipment: Keep in mind that daylight is very intense in the tropics. Use a polarisation or UV filter and bring a waterproof bag to protect your camera from salt and spray during boat trips.
Camping/Beach/Outdoor Gear: Snorkelling equipment
Miscellaneous: Bring an adapter if you don't have a French plug with two round prongs.
Luggage and bags:
As much light weight food as you can carry, including Cliff Bars, peanut butter, and snacks. Even backpaking dinners. You can do it with carry-on, especially if you are going to other islands. Keep It Simple
Clothing/Shoes/Weather Gear: Pants with zip-off legs. bathing suits, 3 shirts. You can wash them in your bungalow. A light weight rain jacket. A net bag for you beach gear.
Toiletries and Medical Supplies: Don't forget sudefed if you are diving. A small first-aid kit is a good idea -bandaids & moleskin if you a doing a lot of walking
Photo Equipment: Don't forget your power converter and battery charger for your camera batteries. At least two 256mb cards for your digital camer. Film is a real pain to protect from x-rays while going through security.
Miscellaneous: My wife and I traveled with just carry-on luggage, which include all our clothing, and dive/photographic equipment. Since my wife only snorkeled, I was able to put my BCD in her carry-on bag. Very little clothing is needed other than bathing suits, hat, sun screen, and insect repellant (needed only when traveling to the inner part of the island). Since my dive buddy was bring his video camera, they had check-in baggage, which include the food suit case which weighted 50 pounds. (Note: if you are flying to other islands on small aircraft, check you weight limits on bags.)