Stack crepes on a plate and cover with foil. Heat in a 300 degree oven for 10 minutes along with 4 serving plates. In a large sauté pan melt butter. Add berries, orange sections, orange zest and sugar. Cover and sauté until the berries are softened and heated through and the sauce thickens, approximately 5 minutes.
To assemble, place crepe on a warm plate. In one corner of a crepe, spoon on 1/4 cup fruit mixture. Fold in 1/2 then again into 1/4. Repeat process serving two per person. Keep prepared crepes warm while assembling.
Serve with vanilla yogurt or whipped cream if desired.