Let's start with THE question: the one that divides and opposes, especially Bretons and Normans!
The Normans say it loud and clear, the Wonder is Norman! The Bretons prefer to say that it was taken from Brittany... There is even an adage that says "The Couesnon in its madness put the Mount in Normandy! Let's hope it comes to its senses and gives it back to the Bretons!
As you can see, Mont St-Michel is indeed in Normandy...
Historically, it was Bishop Aubert of Avranches (in Normandy) who had a shrine built on Mont-Tombe in 708 in honour of the Archangel Saint-Michel (at the latter's request, during a dream of Aubert's, yes, even 3 times).
The answer is in the question!
Le Mont is a city in its own right, with its own mayor, its own postcode, 50170 for the curious, and its own permanent inhabitants (33 in 2015).
After the region and the city, it seemed logical to answer this question too.
Until 2012 it was possible to park at the foot of the mountain, directly in the bay. This has repeatedly shown that cars and the sea do not mix well.
From now on, the bay is open to the sea, at least at high tide, and cars can be parked in the nearby car park. Free shuttles will take you to the foot of the mountain if you don't feel like walking. The same goes for the return journey.
You are bound to find a hotel near Mont Saint-Michel, a hostel on the Mont, a gite nearby or a bed and breakfast right next door.
The Wonder attracts people from all over the world, so there is plenty of accommodation available.
If you park further away and come on foot and do not visit the abbey, you will not have to pay anything! As for the abbey, it would be a shame, though.
A little advice: book your visit to the abbey online to avoid a queue (sometimes very long) at the ticket office on site
This cannot be improvised!
It's easy to walk, but the Bay of Mont is a trap: quicksand, rising water, and above all, unpredictable for us laymen.
Moreover, it can be useful to know and understand the tide times to make the most of your visit.
Consult the tourist office to find an official guide: they will show you the bay and its beauties in complete safety, share their passion with you and are nice to be around!
There are still a number of questions to be asked:
Where to eat near the Mount?
Where does all the water go at low tide?
What are the salt meadows?
How was Mont Saint Michel built?
Why was the Mont built in this place?
etc... etc..
We can answer them (or at least try to), when you come...