Vadaa seems mostly deserted and safe. Turning the town blue again would only help inside the walls, once outside those crafters could again be attacked. I agree that any large caravan would just increase the likelyhood of getting attacked, a fast moving single character might be a better option. Talk to ES directly and personally to see if they can assist if you are worred about safety, its their territory. If the town is red to hinder their enemies then any public posting of when it will be blue again would just help out their enemies as well.