It's doable, no problem. You can get an international driver's license at AAA. Don't know about the hotel situation since I had a motorhome when I was over there. I didn't have any trouble getting campsites. Normandy and Paris shouldn't have any language problem. The only place in France where I had language issues was in Brittany where there were few English speakers. Even so, we got along quite well.
If you're going to the beaches of Normandy, make sure to include Mount St. Michel in your itinerary. There's a good D-Day museum in Caen. We really liked Honfleur also. It's the port where most French sailors left to explore the world.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13