We decided two days before our arrival at Normandy that we should do a tour instead of try and figure it out on our own. I would HIGHLY recommend the same to anyone else wishing to see the D-Day sites.
We found Bayeux Shuttle on TripAdvisor and booked the tour through TripAdvisor as well, super easy process. We had no idea what to expect and with such short notice we figured it might not be that good. We were quite pleasantly surprised! This was an incredibly well done tour and our guide Jon was incredibly knowledgeable about all things D-Day. The van was modern and comfortable and even had onboard wifi! It is a full 9 hour day, but it is chock full of info and you get to see all the major relevant sites, there's no way you could do this yourself in this compact amount of time. Lunch is included and is served in a house that has been restored to D-Day era furnishings, which was also well done.
We were on our three week honeymoon and this tour was definitely one of the highlights of our trip, highly recommended! More