We'll be flying into Paris and would like to see some areas outside of it (been to Paris twice before). We've got four days and were thinking of a road trip making a loop (originating from & returning to Paris) out of the following sites: Giverney, Rouen, Honfleur, D-Day beaches, Mont Saint-Michel, Loire Valley. We thought renting a car would be best to see these areas, but have heard some scary things about driving in/out of Paris. We enjoy history, historic villages, greenery (we're from the desert!), architecture, and being active (biking, hiking, walking, running).
Our questions are:
1) Is there a better way than renting a car in Paris? Catch a train somewhere then rent a car? Return to same location or not?
2) We know 4 days is not a lot to see these areas, do you have other suggestions on how to modify the plan? (Mont Saint-Michel is non-negotiable)
3) Are there opportunities to be active in any of these areas (bike tours, etc.)?
We appreciate your thoughts, ideas, and tips!