We arrived late, so that limited me to only the Hill for taking photos. I would have liked to take some along the walk too. Additionally because of the late afternoon sun, and the desire to avoid the modern city scape as a background, I was very limited in the angles I could use.
I found a spot just inside the gates, where all of the zombies were entering. It was the best I could do, but once settled in, crouching down low, it actually was a pretty good spot. The low vantage point, looking up at the zombies backlit from the setting sun, it gave an ominous feeling.
Some other photos from the Zombiewalk are here: http://gallery.myredbmw.net/v/Events/Zombie2011.