Northern Vendee (France) spots

Going to St Jean de Monts for 1st 2 weeks in June. Looks like the nearest beaches are right in the shadow of and island (L'ile d Yeu).
I've done a bit of research online and haven't heard anything that's getting me excited about the area.
Any advice greatly appreciated.
I've done a bit of research online and haven't heard anything that's getting me excited about the area.
Any advice greatly appreciated.