Just FYI for all who are getting optimistic by all who are posting success in January/February for Gold/Silver members on the Fantasy. Likely the only reason they are seeing availability is because they are sailing in the slowest off season of the year. Other higher season times of the year, on the Dream/Fantasy, pretty much the only chance Gold/Silver have is grabbing a cancellation.
There are basically four things that one can do to help oneself be successful in booking a Cabana.
1. Book Concierge on any ship.
2. Get to Platinum (Still may need one of next two items to be pretty sure of success)
3. Sail in off-season.
4. Sail on a "Classic" ship. There are fewer concierge cabins so chances are better for the rest of us in "Second Class" Cabins.
The more of items 2,3,4 that you can qualify for, the better, of course you really only need #1 but at Disney prices, well, enough said on that.
Having these four items in mind, one still has to log in right at midnight, navigate quickly to your cruise, make and confirm your Cabana reservation immediately. Concierge just make a phone call at 125 days.
Sure, things happen and there may be an occasional opening for Gold/Silver in high or holiday season, but this is not the norm.