We have always done quite well with Logis - you won't find many with really secure parking but, with persistence, you will often find off road parking that is quiet and safe.

Our trip in a similar direction used:

HÔTEL MERCURE MONT-SAINT-MICHEL
route du Mont Saint Michel, BP 8
50170 LE MONT-SAINT-MICHEL - FRANCE

Best Western Plus Le Roof - Excellent food
10 Allee des freres Cadoret, Vannes, 56000, France

Logis de la Loire - Not recommended.
Le Jarrier d'Ancenis Rd 723,
44150 Saint-Herblon,Vair-sur-Loire France Phone : +33 (0) 2.40.96.00.03"

Hotel Residence de Rohan - no restaurant but nearby beach front dining.
7 avenue de Rohan,
17640 Vaux-sur-Mer, Royan France
00 33 5 40 16 99 78"

Le Renaissance
225 avenue de Villeneuve, 40000 Mont-de-Marsan France

Le Clos de la Fontaine Maison d'Hôtes de Charme & SPA - CAHORS - This is a house rented with the owner as cook - very good. Our group filled the house.
444 Chemin Du Moulin Et De La Fontaine - 46090 LABASTIDE MARNHAC
Phone : +33 7 81 76 76 87
Mobile phone : +33 7 81 76 76 87 E-mail : closdelafontaine.lot@gmail.com

Logis Hôtel Black and Green - OK but near a busy road
270 Route de Toulouse.
87000 LIMOGES (FRANCE)
Phone : +33 (0) 5.55.06.25.25
contact@groupebng.fr

DOMAINE DE LA TORTINIERE - Quiet and good food.
10 ROUTE DE BALLAN 37250 Veigné
+33 2 47 34 35 00
contact@tortiniere.com

Logis Hôtel du Commerce - not really off road parking but 4 Morgan 4 wheelers were safe. Good food at excellent price. Convenient for Caen.
8 Rue de la 5ème République
14690 PONT D'OUILLY (FRANCE)
Phone : +33 (0) 2.31.69.80.16"