Travel by Car
It's an easy drive from the UK and other parts of Europe as there is motorway to within 5 minutes of St.Nazaire-en-Royans and you don't have to go through Paris or Lyon. Route planning information and customised itineraries, including detailed autoroute directions, toll charges, places to eat, stay, stop en-route etc. can be obtained from viamichelin.com.
Driving from the UK
To save you having to enter all the info into Viamichelin, this should link onto the easiest route which avoids Paris and Lyon from Calais: Calais to St.Nazaire-en-Royans. The distance is about 580 miles (920km) and driving time about 8 hours 15 mins of which 7 hours 30 minutes is on motorway. French motorways are much quieter than British ones, the services are more frequent and the food is of a much higher standard.
You have the use of your car during your holiday and can stock up with wine and food supplies on the way home.
Below is the easiest route from Calais as it avoids Lyon which can be very busy and tricky to navigate through.