When traveling by car in France, sample the relaxing pleasures of roadside dining as the French themselves do. A picnic is so much more rewarding than the hazards of French fast-food stops. (Ours are gourmet treats in comparison.) Shop for provisions in one of the villages: some local sausages and prepared salad from a charcuterie, bread from a boulangerie, cheeses, plus an apple or pear from a fruit stand. When you see a winery sign, pick up a bottle of local wine, because once you’re outside Paris, wineshops are rare.