The roads that lead to the trailhead are signed well. Off of Hwy 145, the road continues for a couple of miles and forks (take the left fork). The next fork may be confusing at first for some. You come to a three-way intersection, but the two forks on the right are not immediately visible. Look to the right and you will see a sign for the Rock of Ages trail (access to Mt. Wilson) on the middle of the three forks. The rest of the roads (about 11.1 miles total) have really good signage. While I would call the access roads rough 2WD you do have to cross a creek to get to the trailhead. That being said, there was a passenger car with Massachusetts license plates there on Sunday.
TAKE INSECT REPELLENT. I‘ll say that again -- TAKE INSECT REPELLENT. If anyone out there has been wondering where all the biting insects are this summer -- they are in Silver Pick Basin at the new Rock of Ages Trailhead. I couldn‘t even stand outside or open the windows in my vehicle while parked there preparing to overnight. There are swarms of biting black flies and mosquitoes like you would never believe. I was inhaling mosquitoes while trying to take off my boots afterward. Long-sleeve baselayers and long pants are highly recommended in the morning hours to start out.