Pardon my ignorance, but do any of the resorts fill up? We would be going in early March 2019. Are there any that you would need to book by a certain date or risk not being able to get a room there? If so, which ones get the full the quickest? Approx how far in advance would that be? We haven't started researching and just wondering if, depending on where we end up wanting to stay, we need to book by a certain time. For example, might POFQ be full for March by the end of the year.