I really recommend picking up a copy of Chuck Dodd's "Guide to the Black Rock Desert" for trips in this area. I've made several trips out here (none by bike yet) and have found the book to be a fantastic resource about where to go, how to get there, and a little history to boot. If you can pack a fair amount of extra fuel, riding through High Rock Canyon would be a blast. If you come in from the north you have to stop in Fields, OR (north of Denio) for a cheeseburger. Watch for air traffic near the restaurant, twice now I've had planes land in front of me on the road.