We use Abbeville, Rouen, Evreux, Dreux, Chartres, Orleans, then either the toll-free N154 to Vierzon, or the alternative toll route) then Limoges, Brive, etc.............. to your destination.
Do you want a campsite? Camping Ste Claire at Neufchatel en Bray is probably about as far as you'll get before you need to find a site.
We have stayed at Aire de la Baie de Somme many times - but it's probably a bit far north for you - we usually arrive late at night and it's a convenient place to sleep, with showers in the morning. There are other Aires further south, but we haven't stayed on any of them.