I have some open beds and work plots in a few of my Vassals with no one available to be assigned to them. I had all settlements pre-built. Is it possible to either recruit via beacon or move settlers to your Vassals? Most of my Vassals are level 2 or 3 with high happiness and all needs met. Whenever I try to send from a non-raider affiliated settlement, none of my Vassals show up as an option. Or is the only way to increase the working population by sending captured slaves? Thanks!