it's the Daily Mining Gazette (online) and there is also craigslist for Michigan, under "yoopers".
Rentals are more plentiful than you've been told - most of my family lives there - it's just that it's more of a "drive around, see a sign, knock on door or call" kind of process...you know, before the internet

There just aren't tons of people that make advertising worth it; rent is very reasonable in most cases.
The school may have some other help also, I would imagine.
I've seen houses for rent, as well, in the paper. Best of luck in your search
