the tenders will take you right to the shopping areas. no beach that I have seen. dont venture out of the fensed in area, I dont think it is safe to do.
what we do is go to the shopping area, walk around a while and return to the boat. it is not as crowded and you have the pool area almost empty.
when you are entering the Belize waters, go on deck and watch them approaching Belize. the tiny islands are really pretty