I think Shoal Bay East is the best beach for a day trip, it is rated as one of the top ten beaches in the world. There are plenty of beach bars, and places with chairs and umbrellas for rent. Get a cab at the dock, tell the driver what time to pick you up for the return. Or, go early and ask the driver for a tour - think it is $50.00.
Have a great trip.
Ellen

Life's a beach