Could you clarify please: Does the Ivern player need to do anything specific? You say "If Ivern is present on the map" but then "Have them both start at wolves". Do you mean to say that if Ivern clears HIS wolves one of the wolves from the other camp on the enemy side will just poof or does Ivern just being on the map cause fewer wolves to properly spawn?
Either way I'm going to go into a custom and mess around with Ivern for a bit to see what I can make happen.
Edit:
I just took Ivern into a 3v3 custom and used Friend of the Forest on both wolf camps then smite'd and cleared my camp and was given vision of the enemy camp and one of the wolves ran off. I cleared the enemy camp and was given vision of my own camp and one of the wolves disappeared. That's pretty nasty. None of the other camps seem to be effected by this.