I've anchored there twice and gone into the restaurant for dinner. You are correct about the concrete dock that can be used for tenders. Our first visit we didn't have any trouble anchoring but our 2nd visit it took us about 4-5 times to get a good holding. If you are looking at the resort from the water we found better holding / sand to the left behind the reef area. The area to the right (closer to the concrete dock) has much more grass.
