On a recent trip to Bayeux when our car rental in Caen fell through (apparently the guy at the Alamo/Enterprise there doesn't really care if people make reservations and several people left without cars that day -- proceed with caution!), I did some deeper dives into alternative options and discovered what seems to be Normandy's answer to Zipcar/carshare. We wound up abandoning our car-based plans so I didn't try it myself, but I wanted to let others know it's an alternative to traditional car rentals that might be worth exploring, especially if you just want a car for a day or so to get to places further afield:
https://bayeux-bessin-tourisme.com/en/services/car-hire/bayeux/renault-mobilize-bayeux
If someone tries it, I hope they'll report their experience.