Make sure you reserve a room in advance between mid-June and September. If you arrive without a reservation, you'll be out of luck. During this time hotel managers often slap the full-board requirement onto their rates. To beat this, book one of the rare residencias, which serve only breakfast.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.