You can leave that big, bulky suitcase behind because you won't need to take much with you to the hotel. You'll likely spend quite a lot of time dressed in slippers and a plush bathrobe, but usually these are supplied by the resort. If you hope to go for a swim or engage in some aquatic activities, pack your swimming suit and a spare set of clothes. Loose-fitting garments are best. Contemplating using the exercise facilities? Bring workout gear and quality trainers. Oh, and don't forget to bring your toiletries and other essential items.