Tracks will posted soon. They will likely be the same as last year, so if you search the GPS forum you will probably find the 2017 tracks for a preview.
There are some older dirt rides that leave Kerby’s and go up through the thumb. Then you’ll need to cut west and get around the bay. I did that one year to go to the Fitz Run. Honestly, for me it’s easier to just hit I-75 for 1.5h and get up to exit 202 to M-33. Then spend the time enjoying the back roads up that way.