Mike is a great steelhead fly fisher and fine spey caster. You would not regret spending a day with him. Another very good spey casting guide is Dave Steinbaugh whom you can contact through Waters West in Port Angeles. Dave guides and fishes the Peninsula rivers. John Farrar is still another, he can be contacted through Patrick's Fly Shop in Seattle.
The other option you have is getting out on the river with one of the many fine spey casting forum members who live in Puget Sound, or go to Aaron's (speybum) Saturday morning mini clinics on the Snoqualmie in Carnation. There are always good spey casters there who along with Aaron are more than willing to help teach folks how to spey cast or get better at it. Mike Kinney even shows up at it sometimes.