My favorite base in that part of Normandy is the village of Genêts.
The village has a spectacular view of Mont St Michel.
It is also traditionally the departure spot for pilgrims who walk across the bay to MSM at low tide. These cross-the-bay-at-low-tide walks are conducted everyday in the warmer months. My friends who have done it loved it. Goes without saying you should and must go with a guide.
The tiny beautifuli village does not have one but several excellent restaurants. Our favorite is Chez François, a very rural bistro where all the meats - very much meat-focused, and Normandy meats are fantastic, - are cooked in the huge fireplace. May I be such a fascist as to recommend even a wine there, the very hard-to-find and inexpensive Costière de Nîmes red.
From Genêts you can reach Mont St Michel very easily, even by walking, LOL. You can also drive to Saint Malo, Cancale and Dinan, exquisite spots in northern Brittany. Very user-friendly day trips.
We stayed in this big house that is not expensive for what it is (but it has only one bathroom, on the ground floor, while all the bedrooms are on the 1st floor.
The beautiful kitchen is one of the best I have ever found in a rental. The living room is just as beautiful and very cozy. From there and from the garden you can see, looming like an immobile Loch Ness… can you guess?
The rental demands a minimum stay of 5 nights, but we were able to rent it for 4 nights in a period considered non-peak (June). The landlady is charming and accommodating.
https://www.airbnb.fr/rooms/1095058...y8Ry&check_in=2017-06-02&check_out=2017-06-07