A solution could be a fog of war and line of sight with raiders/sappers/sieges wandering almost aimlessly until one of them spots an item/pawn or developments like walls, furniture or sandbags. Then beginning unified assaults or siege based on what they have seen, possibly causing a miss-raid, backfire or even surprise raids spawning possible strategic use of spotters for accurate operation of mortar etc.
I can dream too.
I can dream too.