Clothing/Shoes/Weather Gear: Jackets, long sleeves, slippers, flip-flops are the best attire here. This will protect you from the sand when the wind blows or if you are riding the buggy or ATV. When the sand brushes your skin, it hurts! And, make sure to wear sun glasses so the sand will not get into your eyes!
Raincoats---you may need them, we did!
Photo Equipment: Not exactly equipment, but If you are going here with a plan to do some photography, I would suggest you investigate what the best time of the year would be. We were here the first week in April and had flat, dull, gray skies the complete time.
It can get windy in the afternoon, so take a sweater or sweatshirt with you. Also wear long pants. Fall is the best season because it isn't windy and it is sunny.
Toiletries and Medical Supplies: Always wear sunscreen even though it is windy, you can get burned very bad.
Photo Equipment: Your camera is a must. Bring lots of film. Bring any extra batteries if not a popular size. No camera shops here.
Camping/Beach/Outdoor Gear: Some think the beach is a good place to camp. Some beaches donot allow fires and no vehicles are allowed. Camping can be dangerous. We have had people murdered on the beach by drifters.
Miscellaneous: Bring casual clothes and comfortable shoes.