I've never been to Hunter, but I've been in the area. You're looking at close to a 10-hour drive from SE Michigan. Also, Holimont is a private club that is open to the public only M-F. Weekends it's members only. So there's that to plan around.
My bad I said Hunter but what I meant was Holiday Valley. I'm pretty sure you can make that in under 6 hours from Detroit.