Fry bacon.
Cook onion and celery in bacon drippings until tender.
Remove with slotted spoon. Stir flour into drippings.
Cook 1 minute, stirring constantly.
Whisk in water slowly so no lumps form; slowly whisk in vinegar.
When it comes back to boiling, add sugar.
Remove from heat, add potatoes, bacon, onion, and celery. Adjust seasoning.
Notes: Always salt the potatoes while cooking. Also, salt and pepper the onions and celery while cooking. This holds in a crock pot well.
To double recipe, use 5 pounds of potatoes.