Allan, we have been to this site twice and will probably go again .. so from that you can assume that it's worth the journey. The site has direct access onto the beach and is popular with surfers.
We were pitched on both occasions on the edge of the site, over the hedge and fence a public footpath goes down the side to the beach and we did find it a bit noisy during the night with youths going to and from the beach during the early hours.
There are lots of very interesting places to visit, when we were there each Wednesday night there was a Basque festival night in St John de Luz (10 miles approx), with music and a festival bull which was carried through the crowd at shoulder height - firing fireworks from it! They also had a battle of confetti where it's thrown around - we found bits in the caravan for ages where it was stuck to our clothing. We also went up La Rhune, a small tarin which travels up through the clouds to the summit of a mountain, also visited San Sebastian in Spain and of course Biarritz and surrounding towns and areas.
The people are very proud of being Basque and wear the costumes, berets etc. We found the weather to be unreliable as it's on the edge of the Pyranees and we did have a lot of rain - even in late July.
Writing this has brought back happy memories of our holidays and I have the urge to go again ... hope you enjoy the site and the area, best wishes Tony