There is a reception lounge at the airport that you will be escorted to the bus from. The ride is about 90-120 minutes to the resort. You don't need a car. There are excursions from the resort with transportation provided. Look at the website for prices or complimentary. Skip the shopping one. You can also arrange a private car to take you on a tour or a offsite river raft trip leaves from the beach.
There is complimentary diving, snorkeling and othe water sports that will keep you busy if just laying out all day isn' t your thing.