On Saturday afternoon we drove up to Cerro Gordo where we met the new caretaker and toured the (private) town. Later, we stopped by the (now fallen) Joshua Tree made famous by U2. Full trip report on my blog: Cerro Gordo and U2’s Joshua Tree.
On a relatively harmless stretch of road. The road was graded and didn't need high clearance or 4WD, but power and an ability to drive is necessary or you'll never make it up (and down) the steep grade.