It's difficult to find decent bread flour in quantity (or even 5lb) where I live, so think I'll order. Whole Foods (30-40 min. one way) only has Giusto's Baker's Choice? with 11% protein. I have a year-round cool cement garage, gasketed storage containers, and vacuum sealer. I'll also have to try Costco with a friend who has membership (not worth the $ now that the kids have moved out).
In terms of affordable shipping, my short list at the moment for a high-protein, unbleached, malted flour includes: