Prepare the cornbread from the directions on the box. when cool, crumble. Microwave the bacon until crisp. Cool and crumble. Mix the ranch dressing mix with the sour cream and Miracle Whip. Mix together all of the veggies, beans and corn. In a large bowl layer 1/2 of the cornbread, 1/2 of the vegetables, 1/2 cheese, 1/2 bacon and 1/2 of the ranch dressing. Repeat and Chill!