Hi - we will be in Cancun for 10 days June 11 - 21. We plan on snorkeling a few days there, including a trip to Akumal/Tulum for snorkeling. Should we purchase and bring our own snorkel gear or should be rent while there? There will be three of us. Also, a question for the regulars. What do you do with your personal belongings while snorkeling? Is it safe to leave them on the beach? I don't plan on bringing anymore on the beach then needed (room key, ID, petty cash). Thanks for your help.