I always liked farming in Cataclysm, but I always wondered if there could be farm animals. Like cows and pigs and stuff. then the animals could breed and when they grow up you slaughter them for meat. of course you would have to feed them regularly and give them water. Also maybe if zombies got to them then they would turn into zombies. But you would find the farm animals in the wild and have to tame them.
Another idea is making random zombie hoards moving from town to town maybe or something? that would add a spice to living in the woods.