I think he wants to take the dirt route from Camp Nelso to Johnsondale, is that correct?
I have a track if you'd like it. Or just find 21S94 out of Camp Nelson and take it over Windy Gap.
Oh, here's our tracks on dualsport maps...Windy Gap is on there, it's a great ride from Johnsondale to Camp Nelson. Easy dirt route, takes about an hour, it's 16 miles. http://dualsportmaps.com/?link=106532
Sherman pass road is further south on the Kern Hiway just before you get to McNally's.