I hiked up there a couple days ago. The locked gate above town, which is describe in the Zdon book, is now posted with No Trespassing / Private Property signs. There are also sidebars on either side of the gate to deter foot traffic. We did hike the road despite these signs. I think it's on a permission sort of basis.
We spoke to the caretaker who lives at the ghost town and told him we were planning on doing Pleasant and Cerro Gordo. He has us sign a "waiver" which was just a notepad log book. He did not give us permission to walk the road toward Pleasant nor did he discourage us from doing so. For those planning a trip, it might be best to check in with him before proceeding.