I don't think the resort provides the gear. There isn't any great snorkelling right around the resort, but there are some good boat trips that offer snorkelling and they'll offer gear onboard (I prefer to bring my own snorkel at least… kind yucky sharing those).
Boobs Cruise stops and lets anyone that wants to snorkel, they have the equipment, It's a great deal, pay for the Boobs Cruise and snorkel for free.