Rode that area last Saturday. High traffic day and they were grooming mid-day. Problem was after approximately 1 mile behind the groomer you couldn't tell a groomer had even been there. If I wouldn't have seen it myself I wouldn't have believed the groomer was even out.
With that said. Even on a Saturday the trails were good in my opinion. Definitely good enough to ride. With the colder temps here now I think the trails should be even better. Case in point. I rode trail 15 north from Sidnaw to L'Anse last Saturday and it was mesed up. Lots of choppy sections and some moguls. This area in particular is called the pipeline. Last night this same section was entirely different. MUCH BETTER!