What grocery store chain would you want to be stuck in?

After I read the short the story a long time ago, I couldn't help but wonder "what would I do if the Mist happened here" as I was in a grocery store.. It helped pass the time when I would be shopping with the family. I think Walmart would probably be the best place, as they have guns and tons of supplies, but as anyone who has been in a Walmart, you would have a lot of crazy people. I would also like a store with a pharmacy. If I am going down, I am going down filled with pain killers lol. And wine and beer don't hurt either. Publix are clean and not crazy crowded. Krogers are not bad either. But Walmart has the guns. I wonder if that is worth having to put up with all the people. Anyone else ever pass the time in a store wondering what they would do, and looking to see how much of the front is in plate glass windows, preparing for The Mist?