I can see how the Chippewas in Michigan could be nomadic hunter-gatherers. Their reservation is right in the middle of some great hunting ground, even to this day. I can't imagine all the game that was around a couple of hundred years ago with no cities around to drive any of it away.
In fact, my deer hunting cabin is only about a half hour from the reservation, and I get a deer almost every year. Michigan doesn't get credit for all of the outdoor activities that are available. There's something to do pretty much all year around.