While on my recent camping trip I noted FR 300 was in the best condition that I had observed and I also observed a road grader still working a section west of Woods Canyon Lake. The FR 9350 West of Woods Canyon Lake has also been graded.
In my experience, it is graded twice a year, first each spring around the time of it being opened, and again later in the summer.
It is nice to drive when there are no washboards and potholes, but the first couple of weeks can be a killer if you don't have good tires. The grader turns up all the rocks and many of them are very sharp. It actually takes a fair bit of traffic driving on the road to pack everything down again into a firm roadbed where the sharp rocks get pushed down and are not as much of a hazard on the average passenger vehicle tire. (Good tires should never have a problem either way).