MI DNR does now allow clubs to groom dead end trails (unless they were grandfathered in before the rule was established). That is the reason why the trail to top of Mt Arvon not groomed. Local club might hit it on their own, but dicey to do so, because if they have a major breakdown, they are on their own to get fixed vs. a major breakdown on the state trails.
WD mentioned Brockway Mountain. Another two with great overlooks are the far west end of the UP. Both are in the Porcupines Wilderness State Park. Lake of the Clouds and Summit Peak. LOTC is just up the road from White Pine and then a short walk from the parking area to the lookout. Summit Peak is off trail 11 (South Boundary Rd). It too is a walk from the parking area to the overlook, but there is even a tower there to climb for the best view. If it's not snowing, all of these are a must for jaw dropping.
-John