Sky View Lodge - A great place to stay in the Wisconsin North Woods! (Presque Isle, Wisconsin)
Snowmobile Guys - What else? Guys talking about snowmobiling!
Cloverland Snowmobile Rentals - I have personally rented snowmobiles from this business and their customer service was great!
Thousand Peaks Snowmobile Adventures - I took a snowmobile tour with this company in Jan, 2005. The riding was awesome and they have 50,000 acres for you to play around on. Make sure you visit the "super bowl"!