The good news is that there are not the number of sea urchins and jellyfish at Hedo 3 as at Hedo 2. They do accept credit cards also though. Leave it in your safe deposit box in your room until you need it. Entertainment staff has the volleyballs. Ask any of them for it.
Basketball is either under the basket or in the billiards room.
When place is at full capacity, you want to keep the towels with you as towels do get hard to find then. Resort has plenty of these and fins at the Sports Shop by the Prude Beach. They also have life jackets for going out on boats or snorkelling. They provide Sunbirds and catamarans. Look to teh eastern part of the complex.