7 days in Normandy.

I will be traveling Normandy and based out of Grand-camp-Maisy for 7 days. We will be traveling in mid September. I will be traveling with my wife, my friend and his wife. We will start off by seeing the historic landing beaches, museums and Mont St Michel. I have been to these places before but my traveling companions are first timers. I am asking you fine folks for advice on other must see things. We are really into midlevel history and consider ourselves foodies. We will have a car. We like to hit off the beaten track sites as well.