Coleslaw (for a crowd)

6 heads green cabbage, cleaned, cored and shredded
1 head purple cabbage, cleaned, cored and shredded
4 large carrots, peeled and shredded
3 red or orange bell peppers, cored and finely chopped
2 stalks of celery, tops removed, and chopped finely
1 lb. sugar, more to taste
3/4 cup red wine vinegar, or to taste
6 Tbs. black pepper, more to taste
8 cups Miracle Whip salad dressing, more to taste

In a very large bowl, combine the shredded green cabbage with the
shredded red cabbage, shredded carrots, chopped bell peppers, and
celery. Mix to combine all the vegetables evenly. Then stir in the
sugar, red wine vinegar, black pepper and Miracle Whip. Taste and
adjust seasonings. Serve thoroughly chilled.