Fronts on the Campaign Map
Your steadings are not the only thing on the campaign map. In addition to steadings and the areas around them your fronts will appear on the map, albeit indirectly.
Fronts are organizational tools, not something the characters think of, so don’t put them on the map directly. The orcs of Olg’gothal may be a front but don’t just draw them on the map. Instead for each front add some feature to the map that indicates the front’s presence. You can label it if you like, but use the name that the characters would use, not the name you gave the front.
For example, the orcs of Olg’gothal could be marked on the map with a burning village they left behind, fires in the distance at night, or a stream of refugees. Lord Xothal, a lich, might be marked by the tower where dead plants take root and grow.
As your fronts change, change the map. If the players cleanse Xothal’s tower redraw it. If the orcs are driven off erase the crowds of refugees.