Northern Michigan has been my favorite fly fishing trip in my short life. Such diverse options across the board - smallies, little brook trout streams, opportunities for big browns. I have never fished for the salmon, musky, pike, or walleye that I know they have. They also have awesome tourism, scenery, weather (usually). Even without the fishing, Michigan is probably my favorite vacation destination. If you haven't been out West, I think I would go there first, but keep Michigan in the back of your mind.