Plus where are you coming from?? I can't see driving 6 hours or more for Christmas Mountain, UNLESS you are able to stay at a nice water park in the Dells !!!! Water Park capital of the world, still hard to enjoy both...
Embarrassingly, I'm coming from northern Indiana (yeah this place sucks for snowboarding...and socializing.)
When it comes to snowboarding though, I never stick around and usually go somewhere out West or more up North. I don't mind driving to Wisconsin, done it before (about 8-9 hours) and it didn't take too long compared to what I've done before.
Boyne would take about 7-8 hours, so there's not much difference in time. I did some research and found that apparently, Boyne is mostly just terrain parks and groomers
and has crap room service don't know if that's true though...
But in the end, WHERE THERE'S POWDER IS WHERE I GO!
If there's more pow in WI, then I'm in!