What kind of GPS do you have? With the Oregon, Dakota and Colorado you could make one of the new "custom maps" from the DNR data. See:
http://forums.gpsfiledepot.com/index.php/topic,589.0.htmlOn an older Garmin unit, you would need to download the DNR data in the form of shapefiles (which should be available somewhere). The simplest way to turn this into a Garmin compatible map would probably be to use Mapwel:
http://www.mapwel.eu/Mapwel is not free however, and the files it creates are not compatible with Mapsource. But they work great on the GPS itself and the program is much more user-friendly than other methods of creating Garmin maps.