So would I and once in Michigan, take US 23 (4 lane divided highway) north to Grayling and then west to Traverse City (on M72). Good casino north of Traverse City on Traverse bay. Has RV parking too.
80 is a bugger and so is 76. Toll roads are the best, smoothest and quickest.
2015 Backpack SS1500
1997 Ford 7.3 OBS 4x4 CC LB