Once on the road you may prefer to choose a scenic route, but motorways will get you here the quickest. 
From Calais you might go via Paris, Orléans and Tours to Bordeaux, then south on the A62 to Aiguillon. Coordinates for Burthes, Aiguillon,  

     N 44.32677 E0.38358

ferry Services to Gone Fishin at 2france4two.com

Ferry services

Links to Ferry companies:

Brittany Ferries, P&O.

 'AFerry' offers deals with major companies. 

gallery/panoramic lake