I have the CCC trail map CD, and used it with my Garmin eTrex Legend C around the Wolverine area this past summer. It came in pretty handy when we missed a turn on a road, and ended up about 5 miles from the trail. The CCC trail maps got us back on track pretty quick. We weren't lost for long, and avoided running out of gas trying to figure out where we were. The CCC maps also contain locations of trailhead parking lots and gas stations.
If you ride a lot of the ORV trails in Michigan, I'd suspect that it'd more than pay for itself. $50 seems like a lot, but consider what you spend to ride a single weekend.
It cannot be distributed free of charge on the internet... I believe that it was 1 guy (Jeramey Valley, CCC Mapping Coordinator) who spent hundreds of hours over several months (years?) (without pay!) recording the maps, writing the documentation, producing the CDs, etc. Contact Jeramey (2TrakR) here on DRN for more detailed info / questions. See if he'll send you the 6 page Read Me document that comes on the CD. It has instructions and full descriptions of features and functionality.
Attached below is a small sample, showing the ORV trails on Drummond (red arrows).