Find out what baby equipment the resort or hotel you'll be staying at has available. You might not need to pack the playard or beach tent--both of which can be used for sleeping in the room.
Look into renting baby equipment if the facility doesn't have any available. Go to the Babies Travel Lite website to see if the location you'll be traveling to will have equipment available.
See if there's a drugstore, supermarket or discount department store near your hotel or resort. It might be easier to buy swim diapers, suntan lotion and inexpensive bath toys on site rather than packing them in a suitcase.
Rent a hand cart at the airport if you do need to travel with large baby equipment. Between the usual times needed for travel with a baby--such as strollers and car seats--you'll be too loaded down to handle the extras without using a hand truck. You can also make use of Sky Cap services, if available, to lighten your load.
Take lots of pictures once you reach your destination. There's nothing quite so amazing as the look on a baby's face when she sees the ocean for the first time--or feels sand running between her fingers.