We have 2 nites at each location, driving to each area, then train back to Paris. My question is that enough time in these areas? We have been to Normandy beaches but not Bayeux, new to the other locations.
Is this a good plan? Any input welcomed.
You didn't mention Mont St. Michel. Is it on the itinerary? Are you training back from Normandy or from the Loire valley?
Here are two past threads that might be useful:
https://community.ricksteves.com/travel-forum/france/st-malo-dinard-and-dinan
https://community.ricksteves.com/travel-forum/to-the-west/holiday-ww2-brittany-loire-valley
You might try the search box (top center) on the Loire, because it's frequently discussed here. The eastern Loire is a long way from Bayeux, but that's just the way it is. Have you done some time study on Google Maps?