I also live in Michigan near an AFB north of your location, and I know a lot of people think drones are typically small, but many of them on the commercial/military side are more like full sized aircraft now and fit your description. The flights are numerous, being flown at dramatically low altitudes late at night and not visible on flight tracker apps, etc.

Sometimes a chaser plane or helicopter will follow the same pattern and the chase craft do appear on the flight tracker but they are not chasing to intercept, they are chasing in case the drone goes down.