I found this one in the 2000 annual. It's called Smoky Beans. There were no large quantity baked beans recipes in the late 90's editions.
Smoky Beans
3 pounds sliced bacon,diced
3 medium sweet onions, chopped
6 cans (28 ounces each) baked beans, undrained
6 cans (16 ounces each) kidney beans, rinsed and drained
6 cans 15 1/2 ounces each butter beans, rinsed and drained
3 pound miniature fully cooked smoked sausage links, cut into thirds
3 cups packed brown sugar
1 1/2 cups ketchup
1 1/2 cugs vinegar
1 tablespoon garlic powder
1 tablespoon ground mustard
In a large Dutch oven cook the bacon until crisp. Drain, reserving 3 tablespoons drippings. Set bacon aside. In the drippings, saute onions until tender. Combine the beans. sausage, bacon and onions. Combine the remaining ingredients; add to bean mixture and mix well. Pour into 4 greased 13 x 9 x 2 baking dishes. Bake, uncovered at 350 for 45 to 55 minutes or until heated through. Yield: 90 - 95 servings.