Sites near Arcachon, southern Atlantic coast

Hello. Can anyone recommend a site near Arcachon? We have an 8m twin axle caravan and like most sites on the French coast, pitch sizes are small ! Am looking for a family friendly site, a pool would be nice but not essential. Staying in August next year. Particularly interested in Panorama du Pyla, near Arcachon. Has anyone tried to get a big outfit on one of their pitches ?