PLEASE be aware that Hwy 128 is nothing but a two lane highway (one way coming, one way going) with no divider and no lights in the evening. It is 55 miles once you jump on to Mendocino and very winding and narrow.
We were almost hit head on (a driver in the other lane decide to go around another slower driver not knowing we were in the other lane) and then we almost ran into a hill when letting a faster car pass.
Many drivers familiar with the area go much faster than the posted speed limit which makes it nerve wracking for those unfamiliar who do go the posted limit.
I wish we would have known before booking our trip.