Marriott Rewards members can enjoy complimentary daily breakfast for two, a free night plus a $100 resort credit per stay when staying at participating resorts in the Caribbean and Mexico through June 21, 2010. Advance reservations are required and a limited number of rooms are available so book early to take advantage of the Sand Dollars Package. Use promo code M11 when making reservations. The minimum night stay requirements vary by resort and qualifying charges that can be covered by the resort credit, such as gift shop purchases, meals and spa services, also vary by property. Participating properties include Grand Cayman Marriott Beach Resort, JW Marriott Cancun Resort & Spa and CasaMagna Marriott Puerto Vallarta Resort & Spa.