Curious what people think of trying to do this? The days we have available for a day trip are SNCF strike days, so we really don't want to try and use the train system. Tours are fairly expensive for 4 people... then I had the thought we could just rent a car.
Not sure how bad the logistics and the travel time would be... but it must be possible because they have group tour buses that do it.
Thanks for any advice.