First point: Fahd & Assad will either (a) be very smart and not notice those US aircraft violating their airspace, or (b) we'll say f*** it and take everyone on. Second point: if we don't know where his supply dumps are (unlikely), we'll know quickly enough when he starts moving. Large columns of fuel trucks are rather easily discerned in Western Iraq.
In which case, having declared "You're either with us or with the terrorists" we'll discover that, gosh....