We went to the Vendee last year and it was nice. My only two complaints are (a) no air con in the chalet and (b) I despised constant food making, supermarket trips, cleaning up.
I think wherever we go I'm going to need to suck up (b) and probably next time eat out more.
We're going for a week so ideally nowhere >3-4 hours drive from the port.
Any recommendations!