Aunt Mary's Calico Baked Beans

1 can pork and beans, drained
1 can lima beans, drained
1 can kidney beans, drained
2 cans butter beans, drained
1/2 lb. bacon
2 onions
1/2 c. ketchup
1/4 c. vinegar
3/4 c. brown sugar
1/4 tsp. dry mustard
garlic salt

Cut bacon into bite size pieces, then fry it. Place all ingredients in a crock pot; stir. Cook on low all day until ready to serve.