You can still ride Stead.
Moonrocks is a few miles south of Pyramid lake on highway 445.
Here is the directions from the Hilton, which is at the freeway crossroads in Reno. Using I-80 east, get off at the Pyramid highway exit turing left onto Pyramid at the bottom of the exit. Head north 20 miles to Winnemucca Ranch Road - turn left. 3.5 miles of paved 2-lane to where the road turns to dirt ~1mile (just past the HUGE fenced corral) turn left. You are on the Moonrocks road 3/10 miles and the staging area is on your right.
Using 395N, exit freeway at the McCarran of ramp and continue to the right onto McCarran (you will see a Wal-Mart on your right on the freeway). Follow McCarran until you get to the Pyramid highway (445), turn left. Then follow the directions above.
There you be!