Cadillac trails are good and I also like the Millersburg trail up by Onaway.
We usually ride from grayling northwest towards the Jordan Valley, that is where most of the snow fall in the lower.
The bombing range in Grayling is always good even if the trails are not.
The UP is cool but its alot like a highway, not what the lower is like. Our trip to Drummond Island was fun. But I have not been up around Keewenaw and would like to.