Don't know if they were in force last summer, but we anchored in La Corderie last summer, along with about 10 other boats. We also anchored in La Chambre a few days later with about 30 other boats. No problems on either occasion.
If I had a three day weekend that's where I'd be going now, but I can't leave until tomorrow afternoon, so it's Granville or Chausey instead and back on Sunday. enjoy the weekend.