I've been to Royal Caribbean private islands 3 times. It's no surprise the cruise line's all-in on private destinations.

Cruise travelers love Royal Caribbean's profitable, resort-like Perfect Day at CocoCay private island — so much so that the company is now expanding its destination portfolio.

Brittany Chang/Business Insider

• I've been to Royal Caribbean's private island, Perfect Day at CocoCay, three times.
• The cruise line has seen strong demand for voyages to the profitable resort-like port.
• Royal is set to debut three resorts through 2027 as it competes in the growing cruise-owned destinations market.