In a small bowl, dissolve yeast in warm water. In a large bowl, combine eggs, butter, sugar, salt, yeast mixture and 3 cups flour; beat on medium speed until smooth. Stir in enough remaining flour to form a very soft dough (dough will be sticky). Do not knead. Cover; refrigerate overnight., In a small bowl, mix brown sugar and cinnamon. Turn dough onto a floured surface; divide dough in half. Roll 1 portion into an 18x12-in. rectangle. Spread with 1/4 cup butter to within 1/2 in. of edges; sprinkle evenly with half of the brown sugar mixture., Roll up jelly-roll style, starting with a long side; pinch seam to seal. Cut into 12 slices. Place in a greased 13x9-in. baking pan, cut side down. Repeat with remaining dough and filling., Cover with kitchen towels; let rise in a warm place until doubled, about 1 hour. Preheat oven to 375°., Bake 20-25 minutes or until lightly browned. In a small bowl, mix confectioners' sugar, cream and vanilla; spread over warm rolls.