Chose to walk along the sand dunes because they are connected with the island's shore. If the sea is the sea between the islands. And there will be a walk in the sand dunes at low tide only.9:.00 am
Therefore choose to walk along the dune, dune is connected between the Islands to the coast, but if you are in the middle of the sea, etc links between the island and the water poured down the dune. 9:00
Choose to be within walking distance to the sand dunes sand dunes because I will be connected between the sea and the shore, but if it is to swim in the sea link between Island and there will be a walk in sand dunes, water only.9:00.