I am not sure, if I understand the following rule:
Set their target Zone before moving them, ignoring Vaults (open or not).
What do they do in case all the survivors are hidden in the Vault?
1. They do nothing at all.
2. They move towards the nearest Vault entrance and stay above it.
3. They move into the open Vault door, if they are withing 3 spaces?
Thanks in advance for your help.