Suggins' (ie: shot gourds, shot bags, shot horns or even shot bottles) were used. "Getting the Lead out " and Jim Webbs "Accoutrements" books have quite a few examples. I dare say they were in such common use that there are way more extant examples of old suggins' than old Carolina guns actually, and in a pinch you don't need the pouch for carrying one, just a handy pocket. However, didn't most squirrel hunters use a rifle per the available documentation of such?
Tim A