Welcome to the site Fulcanelli,
Well, I think you've already hit on the best resources.
I've been through many books, and can't say I've found any better The Audubon Society Field Guide to North American Mushrooms and mushrooms Mushrooms Demystified . These 2 books are bibles of hunting. They should help you identify 90% of what you find.
Mushrooms Demystified is the best resources, packed full of info. The only problem I have with it, is that I find it too big to lug around while hunting
The Audubon book is the perfect partner while hunting, tones of info and it small enough to fit into a pocket.
Your also dead on that a local resources is the best place for info on your area.
Here's a couple in your area:
The Michigan Mushroom Hunters Club -
www.sph.umich.edu/~kwcee/mmhc/
West Michigan Mycological Society -
dancingmac.com/wmms/
Most clubs and Mycological society get very active this time of year, so contact them soon. I've found that most areas have a yearly mushroom show, these are great for seeing what Fungi are in you are in one place.
Hope this helps. Let us know how you make out and share the pics