Just create an orb, that the Scout could pick up in the stronghold. If the scout leave the stronghold area he will lost the scout ability, and the orb got replaced.
Just for misbehaving people.. give two Commanders or 5 Players on the Map, IN the stronghold the power to reset the orb at its picking place. Would be nice if the Scout could give orders to the npc soldiers.
If someone IS a scout and the stronghold got lust you could share a small reward and for a good successful defending a bigger one.