Tracks would be fine but the excellent job Oregon does with trail marking and provided maps makes a GPS unnecessary. Just a suggestion- grab a map at one of the trailheads and do the Chesley's Challenge route. Fun stuff.
"We want to be free! We want to be free to do what we want to do! We want to be free to ride. And we want to be free to ride our machines without being hassled by The Man. And we want to get loaded. And we want to have a good time!" Peter Fonda in "Wild Angels"