Barricading myself in somewhere like a huge shopping store would definitely be an idea I would have, especially if it was a store that cooks their own foods like chicken and such because then you would have the ability to cook food as well as also have access to as much food, toiletries and such as possible. I guess if I could get in a shopping store near numerous other stores within short walking distance that would be amazing as well as I would have access to a lot more than just what is in a store, my only worry would be how I would get to and from safely. I guess if the store I barricaded myself into had DIY products I would be able to grab things to use against the zombies and be safe going from one place to another.