steenv if you are going back to Normandy then I would recommend at least 2 things to do . One is watch "The Longest Day" film and study the St. Mere Eglise scene. When you arrive at the square with the Church in the top left hand corner, look around you. It's all pretty much the same as it was in the film and probably very much like it was at the time of the invasion. There is also a very good museum next to the square with one Sherman on display.
The second recommendation is to visit Bayeaux. Park your car in the top car park, walk down street, turn right, walk on a bit and then look to your right. The view of the Cathedral is amazing. Then walk up the side of the Cathedral, turn right again and approach the entrance.
When you walk into the Cathedral you will be staggered with its beauty. Even my teenage daughters were struck by its beauty.

Let me know how you get on,

All the best,

Nick.