I ordered my case of water from Costco for our trip this past June. It worked out great.

I ordered about 5 or 6 days before our arrival date. I put the resort name and address in the ship to section. You also need to add Hold for guest (name and arrival date.) I know there is a thread somewhere on these boards that gives the addresses for all the resorts and info on how the list your info for delivery. I would order again in a heartbeat. Good luck.