RE: How to hunt Grouse at this time of the year??
I assume your hunting situation in Michigan is similar to that of northern Maine, where I live. During bird season, driving the logging roads is the most common strategy. Once deer season hits here, most people forget about birds, even though our season now runs until the end of December.
Late in the season, when there is snow on the ground, birds will head towards thick swamps and thickets for cover. Find their tracks and you will find the birds. Be ready for them to flush out of the thick evergreens, when one flies most often there will be more as well.
Good Luck!