...just be very mindful of the schedule of return times since they are not the same every day...if you are not careful you could find yourself facing a semi-pricey taxi fare back to Pontorson (as was our lot) so you can still make your train back to Bayeux or wherever it is you are staying that evening! Then again, if you drive your own or a rental car here, be mindful of the tides. During high tide, this lot becomes submerged, no kidding!
Saint Michel has no train links unfortunately, so I guess the bus is your best option.
St Michel is in Normandy, (from St Malo follow the coast to the east and just before it takes a sharp climb north thats St Michel).
MINIBUS WITH ENGLISH, ITALIAN, FRENCH AND SPANISH DRIVER IN RENNES, ST MALO, MT ST MICHEL, NANTES...FOR TRANSFERS OR GUIDED TOURS, EXCURSIONS...