Be sure to leave plenty of time...as you already know, it can take a while just to get to the family beach because you can either take a tram or walk. The tram for the adult beach is at the far end of the family beach, near where the bikes are rented. It's a LONG walk, so the tram is your best bet, but they only run one so it can be a while if you just missed it. Once you get off, the cabanas will be nearby. Don't be like the poor lady we saw on one cruise recently. My husband and I were walking on the path that goes past the cabanas and runs all the way down behind the adult beach. Two ladies were following us, which I thought odd because they didn't seem to be dressed for walking. But hey, whatever floats your boat. When we got to the end of the trail, the poor ladies asked us, "Aren't the massage canabas here?" They had totally missed them, and now they were late for their masages! I felt so sorry for them. Next time, if I see out-of-place people walking, I'll ask them where they're trying to go.
Barb