The resorts gift shops have whole milk (including larger cartons of it). Some restaurants have it, but some don't. I don't think it would be a problem to alternate between the two for a week. I personally wouldn't want to have my 15mo only drink 1% for that long, especially with a not-normal diet of other foods during that time, but I'm sure others disagree. When we were there with a 15mo, we were back in the room for naps, so most of his milk came from a larger carton in the room fridge.