Bro, those colectivos are cool for a ten-minute hop, but they won't get you anywhere near the hidden swimming holes in the jungle. Sorting a rent a car deal for Mexico online before you even pack your bags is the smart move, walking up to the Cancun airport desk without a booking just means overpaying for a clapped-out hatchback. You can browse the 4x4s and convertibles available for your dates right here
https://getrentacar.com/en-US/mexico .