Leave that huge, expandable suitcase behind because you won't need to take very much to the hotel. You'll likely spend a fair amount of time dressed in a bathrobe and slippers, but typically these are issued to guests at the resort. If you're planning to go to the hot tub and pool or take part in some relaxing aquatic activities, pack a swimsuit and a change of clothes. Casual, non-restrictive garments are a wise choice. Considering using the fitness facilities? Bring some gym wear and a pair of comfy trainers. Oh, and don't forget to bring your toiletries and other essential items.