Oh, excellent, I don't have to worry about that particular complication then.
It does make things a bit more complicated though, if I remember, and you say as much, the Trollocs were essentially terrified of the Aiel after the invasion of the waste failed, and I can't recall if they really bothered to leave the waste during the war, (at least in large numbers)
So, do you mind if I take certain liberties so as to have a respectable (Not all of the tribes, probably not even 1 whole one) force of Aiel present?