We are returning to the DR next summer after a fabulous trip this May. We are flying into Punta Cana (because that is where are frequent flier miles airline flies). We will be staying in La Romana and would like to get there without renting a car. Is there a bus company at the airport for which we can make reservations to go to La Romana? Or are there gua guas there regularly we can take? We need to be sure of the transportation piece as there are six of us (two parents and our four kids). We appreciate any advice you can give!