Here’s what it says in the Ixtapa Resort Guide:
Booking excursions
A variety of exciting optional excursions are offered by the Club Med Excursion office. You will be able to sign up for excursions upon your arrival at the resort. Excursions include tours such as Zihuatanejo Shopping & Sightseeing, Dolphin Experience, Sunset Cruises and Zip Line. When you arrive at the resort, visit the Excursions Office to sign up. Forms will be accepted until midnight on arrival day. Excursions will be filled at random so all guests will have the same chance to get the excursion(s) of their choice, no matter what time they complete their forms. If you would like to be on a specific excursion with friends, be sure you staple your forms together and indicate your preferences. On Monday at 12 noon, names will be posted for each excursion. If there is a discrepancy and changes are needed, please see the Excursion Manager before 8 p.m., otherwise, your account will be charged and the cancellation policies will apply. If there are spaces left on any of the trips after this process, you will be able to sign up at the Excursions office. All excursions and ground transportation are provided by contractors that are independent of Club Med and Olivia. Therefore, as previously stated in our contract, Olivia and Club Med are not liable for any act, or failure to act, by any third party independent contractor. Please note that gratuities are always appreciated. If you feel that the guide and/or driver for your shore excursion did a good job, the recommended gratuity is $3 per person for a half-day tour and $5 for a full-day tour.
We have never had a problem getting excursions at resorts – or for that matter on ships!