For my soup beans, I use either Cranberry Beans or Shelly Octobers (basically the same bean, just different people call them different names).
I usually prepare the beans for cooking and put them in the freezer long before I ever cook them. I sort and rinse them really good. Then I soak them in water over night in the refrigerator. The next morning, I drain the water off of the beans and drain the beans on paper towels. Then I put them in ziploc freezer bags and place in freezer until I am ready to cook them. (I don't know why, but preparing them this way seems to take most of the gas out of the beans.

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When I am ready to cook them, I put the desired amount of beans in my pot (whether it is a dutch oven, crock pot or whatever) and cover with water. Make sure to add plenty of water as the beans will absorb some of it as they cook. I add about 1 - 2 tablespoons of butter and several slices of country ham "biscuit slices". You could omit the butter and country ham "biscuit slices" for a slab of fat back.
Then just add heat and let them cook slow over low heat. Be sure to stir occasionally so they don't burn.
Add seasoning salt, salt and pepper when you are ready to serve as salt tends to make the beans tough if added before cooking.
Oh, and don't forget the corn bread.
Hope you enjoy!