The “extreme couponing” movement is fascinating. In larger communities than mine, people can combine coupons, sales, and store policies (like double- or triple-coupon days) to walk out with free or dirt-cheap groceries, hygiene items, and other goodies. When you’re trying to build a survival stockpile, every dollar matters; it’s great to get a years’ worth of toothbrushes for the entire family for just a few dollars, for example, and to stock up on canned vegetables for twenty cents apiece. However, I live in a small town. This rural part of Texas includes a Wal-Mart Supercenter, a local grocery store, and …