So the other day I went to a Rite Aid to buy a package of Depends. I know they suck and all, but I was desperate. Anyhow, I go the the back of the store, grab a bag, carry it in the open up to the counter just like normal, and set them up there like this was something normal. The cashier proceeds to ask me about if I have a rewards program card thing. We stand up there going back and forth with her telling me the benefits and stuff, and me politely saying "no thank you". I end up telling her that I was visiting this area, which is not a lie. She responds with, very politely I must add, "Well, whenever you buy something, like whoever this is for..." and gestured to the package of Depends on the counter.
Point I'm making, she had no clue I was buying them for myself and frankly didn't care. So if you are nervous about buying diapers from a brick and mortar store, don't worry. Just relax and go in there like you were buying a loaf of bread. I hope this helps someone out there!