First, I want to say I'm sorry, in general I *hate* this kind of complaint, but:
This is not horror! It could be questionably ethical sci-fi/fantasy, but the story is hopeful, charming and surprisingly bright in the resolution. I had to get that off my chest - I would have preferred this story on Escape Pod, here I was waiting for the other foot to drop the whole time, only to have Alistair talking about the Walking Dead before it happened.
That said, I really liked it. The fact that this caravan had figured out how to live in the post-apocalypse world, sounds like they learned to thrive, actually, was appreciated. I think there could have been some opposition to the re-animation in the story, it seems unlikely that would be so readily accepted, even in that world.
If someone wants to get a Walking Dead fix, do yourself a huge favor and check out the Telltale Games Walking Dead game. Three Episodes are out already, and it might just be the definitive take on Kirkman's Zombie Apocalype. It is fantastic so far, and brutal, and borderline sadistic and wonderfully terrible. I think it is a good few steps ahead of the TV show, and only lagging the comics due to the smaller amount of story to work with.