Don't forget the cherry fesitvals, oi!
I haven't been myself, but a former co-worker accidentally ended up in Leelenau lastsummer while they were having some wine tasting, though I don't know if it was a formal festival or not. I haven't tried a single wine of theirs that I didn't like and I often daydream of driving up there to drink it right from the fountain, so to speak! It's so wonderful to have something that's purely Michigan-made. It gives you something to feel good about amidst all of the other turmoil.