Yum, my Ma makes a huge crock of it every year in the fall months.
She never uses an airlock she just covers the crock with cheese cloth and puts it under the stairs in the garage. I guess because it stays a constant temp there, and it's dark. Ma's getting up there in age I guess I need to make it with her, so I can carry it on for the rest of the family. We never freeze it we keep it in gallon pickle jars in the extra refer the stuff lasts almost a full year. I'm sure it would last longer if we didn't eat it.
People that say their body can't handle it likely haven't had it homemade. It's good for your guts and doesn't cause gas like the store bought stuff does. I've turned on a bunch of friends to it that said the love it but can't handle it. If you eat a few tablespoons full every day for a couple of weeks you would be surprised how good it is for your guts...LOL