I might try to shed some light on this law, as there seems to be much confusion about it. Trust me, I'm not defending it, just explaining it.
People need to understand that national forest or wilderness designation of any land does not guarantee you the opportunity to hunt. The states grant you that opportunity regardless of land status. The wilderness guide law is a state statute that uses the wilderness boundary as an "arbitrary" boundary for defining the state law. They could just as easily say you need a guide "inside of Teton County", or "the Hoback Drainage", etc. That fact that it is the wilderness boundary confuses people, many thinking they have certain rights to publicly owned land. However, it is the authority of the state to establish laws for hunting and fishing, and this one says you need to have a guide inside the "arbitrary" boundary.
This law was challenged and it was immediately dismissed, because essentially any challenge of this law is a challenge of the States Rights Doctorine, an established Supreme Court case.
Anyway, I know it is unpopular, but the WY state legislature would have to change this one, and that will likely never happen.