I have heard Rainbow Lake can be good fishing, in fact I believe I have a flyfishing book somewhere from years past by Jim Bradbury that talks about it. I also believe that it is on private property so not sure if its still open. I am posting this from my Blackberry and don't have the bookmark, but I think the cascade ramblings website is where I read that it is private. There are many good Brooktrout lakes above Detroit, might want to check out Round lake up there too, Brook and Brown trout if I remember correctly, and it at least used to be restricted to barbless flies and lures.