Don't have an update for you. Maybe check the San Gorgonio Board?
Alex's route is interesting. He starts up the ridge and then goes down into the Limber Pine Springs drainage. My intuition says "stay on the ridge", something like the
green route. I wonder why he dipped down off the ridge?
There's really no reason to traverse all the way to the ridge that the green route climbs. I've plotted another route in red up the previous ridge. The route first follows a ridge then a shallow gully. If the gully were really drifted, one could cut across from the red route to the green route via the gold route. If one were higher up and needed to exit the gully, the ridge immediately east would be a possible route.
Just reading the map. I'll be interested to read your TR.
HJ