FYI: If you ever wanted to check out a hovercraft operating over ice, water and snow, here are a couple of events for you to consider.
December 29th on Gunn Lake (near Kalamazoo).
Feburary 4th & 5th on Devil's lake (Adrian).
Link:
http://www.hoverclubofamerica.org/index.php?showforum=18
The event on Devil's lake is supposed to have snowmobile drag races, motorcyles, hovercraft and perhaps an ultralite the weather permits.
http://www.hoverclubofamerica.org/index.php?act=calendar&code=showevent&eventid=32
Not responsible for frostbite - be smart, dress for the activity.