I currently live in the caretakers house of a school, located in its own driveway with a 10ft high metal fence surrounding the majority. There are only 2 entrances to the grounds, One large driveway at the front, with embankments, And the other to the rear, a large access gate often locked and secured against normal human intrusion. My idea is simple, Liberate several minivans, maybe a bus of some description, and block up the front, Securing it from possible zombie attack. The area itself is very secure, as it is designed to prevent intrusion from theft.