How to Vacation Like Royalty, on a Budget

The Middletons make an annual trip to the ultraluxurious Caribbean island of Mustique every January to celebrate Kate's mother's birthday. The family — including Prince William and baby George this year — rented the $18,000-a-week Rocina villa. Of course, one doesn't have to pay the price of a small car to visit Mustique, a destination also loved by Queen Elizabeth's late sister, Princess Margaret. One of the island's best deals can be found at The Cotton House, where rates — while only relatively inexpensive — start at $450 a night.