I was visiting the folks in Utah a couple years ago and there was an article in the paper about a wolf that got caught in a leg trap in Southern Utah. It was a tagged wolf that had been wandering Wyomng/Montana and wandered all the way to Southern Utah..... so they do know how to spread out.
A legal trapper killed it and was not prosecuted, according to the article. (clearly, he wasn't trapping wolves down there).
Dan