Light weight cotton clothing, comfortable walking shoes, and sunglasses.
Forget the hat, unless it ties under the chin it will not stay on.
Toiletries and Medical Supplies: Use plenty of sunscreen. Red is not a becoming skintone.
Photo Equipment: 100 speed film for those bright sunny days or an extra memory stick. You can't get enough pictures of those brighly painted houses.
Miscellaneous: The water on Curacao is very good. No need to buy bottled water. Just asked the cats.
Luggage and bags:
Bring some kind of day pack for when you'll be out all day.
Clothing/Shoes/Weather Gear: Bring loose fitting clothes. It is hot most of the time although sometimes at night it was a little cool. I wore shorts, tanks, lived in my flip flops, or wore a loose fitting cotton shirt. Flowing skirts are appropriate. It didn't look like people dressed up much. Maybe if you go out to a nice restaurant.
Toiletries and Medical Supplies: Sun screen, sun screen, sun screen
Photo Equipment: I don't know much about photography. My 5mega pix digital was fine.
Camping/Beach/Outdoor Gear: Bathing suit, outdoor shorts and t-shirts (for kayaking, or walking on trails). Bring water bottles. If I spent the day at the beach then I always brought a shirt that covered my shoulders. If you go snorkeling all day you'll want to wear a t-shirt. Brink snorkeling gear, even if you think you'll won't want to snorkel or if you've never done it before- people just walk into the water and snorkel around.
Miscellaneous: I brought some food with me just in case I couldn't get any there (like powered cream for my coffee) but that was a waste. There are huge grocery stores, warehouse-style. One that I went to a lot that was convenient was Strada.
Clothes in natural fibers are cool and fresh. So your choice would be linnen, silk, wool, cotton.
Who ever forgets his sunglasses?
Shoes: comfortable, cool and easy. For the beach you would be wise bringing along plastic sandals to protect your feet from harsh stones and corals while swimming.
Toiletries and Medical Supplies: Sunblock!
Photo Equipment: Photo films, videocasettes and batteries: most brands available. One hour services available.
Camping/Beach/Outdoor Gear: Nude swimming is not allowed, but topless is tolerated on some beaches.
Clothing/Shoes/Weather Gear: A hat is essential since it is hot in Curacao. Mine came from Coolibar and is the best wide-brimmed hat I own. Make sure it has a chin cord otherwise you will lose your hat due to the strong trade winds.