Normandy/Le Havre Baltic cruise
 

We will be on a Constellation Baltic cruise June 19 sailings, we are wondering if we can tour the Normandy ( Omaha Beach, etc) by ourselves instead of joining the ship's excursion.
Also, does anyone know how to get from the Stockhokm pier to the International airport? We will be catching an early 7.45am flight home.

Thanks in advance