hi David,
that's easy, you stop the public bust just in front of the main gate of your resort and do the 40 minutes ride there, they drop you of in the middle of all. buses run on their regular shedule on that holyday, no prob on that. for the way back here where ever you may be in higuey at that moment, you just grab a Motoconcho and tell him to bring you guys to the bus station for bavaro, there you go on the bus for bavaro(not for punta cana and not for cabeza de toro, just the one for bavaro, the 3 of them start at the same terminal) and let the driver know you want to get droped off at the "Melia"(there's the paradisus palma real in the same resort, same entrance), so they let you know when you arrived.
Mike