Soak the beans overnight in plenty of water. Or, bring them to a boil on the
stove, turn heat off, cover and let sit for an hour or two.
After the initial preparation, boil beans on the back of the stove for about
half an hour. They won't be perfectly soft, but they will be almost soft. Drain
off the cooking water.
In a very large (8-quart) casserole combine the semi-cooked beans, salt, dry
mustard, molasses, sugar, onion and bacon. Add enough hot water to barely come to
the top of the beans.
Put a lid on the casserole or use aluminum foil to cover it.
Bake the beans at 300 degrees F for about 5 to 7 hours.
Slow Cooker Method
Boil the soaked beans for half an hour, as directed above.
Then, instead of combining everything in a casserole, combine them in 2 slow
instead. Put the lid on the slow cooker, and cook on HIGH for about 3 or 4 hours,
or on LOW for 6 or 8 hours.