Freedomfighter, You won't look much different than some of the hotel guests coming off of the beach. Reservations always seem to make things go smoother. You can make a reservation using OpenTable, or call them at +590 590.29.79.99.

The last that I heard, beach chairs were around €30 each. On their FB page, it looks like they're changing many of their chairs over from singles to doubles. I have no idea what they'll charge for the doubles.