Our DS is 18 (soon to be 19) and on our last couple of trips to the YC he really didn't go to SAB much during the day. He would (typically) take off to the parks on his own during the day, meet up with us for lunch and some park time, then come back to the hotel late afternoon. After dinner he usually headed to one of the parks again. He did enjoy floating around the lazy river after he came back in the evening. It was his way of cooling off from the day and relaxing before bed.