We actually rented a car from National at the airport for $40.99. We did a one way and dropped it off at the Dolphin. For our return trip National sent a shuttle for DH and he picked up the car and we dropped it back off at the airport. We are a family of 4 and had 5 carry ons, 3 large suitcases, a cooler and a stroller in an intermediate size car. Our first car was a Chevy Malibu and our second was an Olds Allero. Very comfortable! We weren't cramped at all.