Last time I visited the Motherlode wall, my car almost didn't make it back up the hill. Is there another parking area close by I can hike to the wall from? What if I pay the guy at the top of the hill $5 to park at his house?
depending on water level and clearance your you could go in through Fixer Road. You have in pretty major stream fording and a couple of drive-down-the creeks. But it is a fairly level trip. It would not be good in times of wet weather though.
As it states in the guide book if you can't make up the hill climb somewhere else. Its harsh but that's the reality. The road does get graded every once in a while so its possible that the road is in better shape now than the last time you were there.