I'll be heading out to Ghost Lake this weekend to play around on the ice racing tracks that are set up. If anyone else is interested we can meet up. I'm good for Saturday or Sunday, supposed to be nice both days.
I was out there last weekend for an hour or so and it was pretty fun. There is a group that has plowed 6 different tracks and you can just jump onto any of them. It's stock friendly, even with a normal car. There are very low snow walls (a few inches high in most spots) so you won't damage a Jeep but you might tweak a bumper on an Accord.
There were people out in all kinds of rides last weekend. Prepped cars, ATV's, SXS and dirt bikes. And a lot of regular people like me just popping in to try it out for a few laps on each track. It's not organized, just be sensible, wait your turn or find a spot in lap to jump in. People spin out and you just have to be sensible about your speed etc and help out if someone gets stuck.
You go in off the boat launch on the north side of the bridge.
https://goo.gl/maps/F81YKkvX6dtamxae6Its protected from the wind and lots of people have fires set up along the shorelines with groups bbqing etc.
If you're interested, post up and we'll see if somthing can be organized, even if it's just for a few hours to try it out and watch some of the others.