We were very happy with our winter in La Rochelle. Nice town, great services if needed. We stayed at Les Minimes, friends stayed in vieux port. They had less privacy and more noise
than we did, but we walked 15 minutes to get to town, while they were "in town".
Good public transportation.
I have no experience with Brest.
If you're going cheap
, you could anchor
up "La Villaine" and have shopping
nearby in Redon and La Roche-Bernard. Redon has train service
, but the anchorage at La Roche-Bernard is better, and closer to town. We anchored between the bridges.
Both towns have marinas
if you wish, and storage on the hard
at Arzal, at the mouth of the river.