I had planned this trip for last year but circumstances intervened so I'm now planning for this September (15- 3 October). The planned route is essentially fly into Paris, train to Rouen, pick up a rental, drive to Bayeux, drive to Brittany, drive to Saumur, trade car for bike, bike through Loire Valley to Orleans, train to Chartes, train to Paris, fly home.
The entire trip is likely to be 16 or 17 nights which I'm roughly dividing into 7 nights in Paris and 9 nights doing the loop through Normandie, Brittany and Loire (subject to adjustments but I want at least 5 nights in Paris).
My question now is about Brittany. The only site I want to see is Carnac but I'm debating whether it's best to drive from Bayeux to Dinan, stay one night (not that I like one night stops), drive to the Carnac area, see the stones, stay a night in that area, then drive to Saumur the next morning.
This only gives me two nights in Brittany. I could add a night and/or stay in only one location. Other than Carnac, I'd only want to eat some seafood, see some local architecture and see at least one beach on this peninsula.
I'm interested in thoughts on good places to visit and/or stay in Brittany (you can weigh in on other parts of the itinerary too); things not to miss; etc. I'm open to all ideas since my itinerary isn't even penciled in yet.