I am trying to plan a 5 day trip to the Yucatan Peninsula for family of 4 mainly to see the ruins in the 2nd half of December. Our plane ticket is all set and we will be flying into Cancun. But I am wondering whether it is a good idea to rent a car or is it better to take public transportation. We like the flexibility of having our own transport but am nervous about driving in a foreign country. Also if we do rent a car, is it better to take the rental car company insurance or will it be suffice to use a credit card like the Ink or the Sapphire Preferred. Thanks.