I've been to Royal Caribbean's private islands 3 times. It's no surprise the cruise line is taking nearly all its Caribbean sailings there.

Source: Business Insider

Cruisers love Royal Caribbean's private island — known as Perfect Day at CocoCay — so much so that the company is expanding its destination portfolio to send 90% of its Caribbean voyages to. Brittany Chang/Business InsiderI've been to Royal Caribbean's Perfect Day at CocoCay private resort three times over the years. Cruise lines are all in on these private island resorts: Passengers love them, and they're insanely profitable.