We change the check in time on rare occasions due to boat capacity not being met, weather conditions, sunrise & sunset changes throughout the year, etc. please make sure your day is open and free within several hours of your check in time if it must be moved. You must be available to move check in time. Please keep your form of communication on cell phone available at all times throughout the day of your tour. Make sure your phone is USA friendly so we can contact to you, if not you must download WhatsApp on your phone that way we can reach you!