Yes there is. Its on the road that runs down behind the dune. which I think is the D218, maybe 4 or 5 miles south.
Its actually located between the road and the coast/dune in the forest, and was one of the most vivid memories of our trip down there last September. There must have been a 100 motorhomes in the forest while we were there, almost like a white army hiding waiting to invade.
Sorry I cant give you an exact location, but my aires book isn't to hand.
Stu