I usually refrigerate the majority of it. I've never bothered with freezing it unless I made really huge batches, and refrigeration combined with the salting of the meat has avoided any issues. In the interest of full disclosure, I've never tested the duration of uncured jerky past about 3 weeks with this method, so I don't know what the "eat by" date is.
As Poser mentioned, the paper towel inside the bag seems to help a bit. Somewhat ironically, if you leave a refrigerated/frozen bag of jerky open on the counter, it will condense some water vapor in the bag, so it sometimes needs a bit of help to stay dry sometimes.