The route that was on your geoladders link cannot be shuttled (that is, you cannot start from the top and just go down). It would need to be done as an out and back.
Back in the day (it seems like forever..) when Angeles Crest Highway was actually opened, it was possible to climb up the south side of Earl Canyon, then descend the North side down to Angeles Crest Hwy (and have a car waiting for you there), or vice versa.