Is the new question "How much land do I need to shoot zombies?"
Yes - old thread - but still an interesting topic.
I've got over 100 acres and I am very cautious when shooting. I always fire inward to my property, or against a definite backstop. A little carelessness could easily put a round through a neighbor's wall.
There is a big "IF" in that law . . . {. . . if the commissioners court, by order, prohibits. . .} Have you checked with the county to see if you are on the prohibited hunting list?