Colville Sur Mer where the big American cemetery is worth visiting along with the British cemetery in Bayeux just to see th edifferences between the two, good museums in both places and you'll also be on Omaha beach in Colville sur mer. Also near Pegasus bridge is a small cemetery with some graves of the special forces which are still tended by the locals in thanks and the church hasn't been repaired.
Stayed at he Lion D'or in Bayeux, lovely hotel and a good base.
Be prepared to feel incredibly humble and shed a few tears!!