Hi Matt - thanks also for your email.
Have a look at my webiste for some ideas:
http://battlefieldsww2.50megs.com/no...ttlefields.htm
If you are looking for unmissable sites, I would say in the area where you are Pegasus Bridge, the Pegasus Memorial Museum, plus Merville Battery all excellent. You could then take a drive along the British beaches ending up a Arromanches: that should fill your time and give you an appetite for more visits!