i think the defense will be really great for this if the Archers will be able to shoot from there forcing them in through that one way passage and rally civilians inside at the current place where my flag is or even inside the Castle / Keep 
Not sure how often your people eat in stonehearth but if it’s once a day i guess i could keep the archers guarding there and let em go eat once a day. Better hope i wont forget them up there tho
Hope for a change for the guards soon so they go take a snack of food and sleep when needed and potentially even let us set their sleep pattern to always have guards positioned if needed