I'd say watch this site and ride whatever is open (unless you have a boat, there are 3 to choose from). You can't go wrong, all 3 trail systems are pretty bad-ass in their own way.
Have fun!
"Start and end at a brewery, and a very cool snow and Ice urban/cross country, lake ride in between with flasks ful of Krakin... YAH MON!!!!" - Vibrato
"Every one of you should ride a bike and be yourself. I really and truly believe that bikes make the world better, and that anyone who spends some time getting used to life on the saddle will find that it makes their life and the world that their life is locked to, better; in almost every way." -Gern Blanston, Surly Bikes