Have a look at this map. Use the street view to look at many of the dodgy looking bit. Here is a typical one - on one of the tight bends. The road looks new on the bendy bits, it is full 2 lane with edge lines. If you slow down for the bends then most of it looks like you should have a good run. Look at many more spots along the road and see if I missed any bad bits.

No problem we took our 21ft tandem there last year, keep your eyes on the road not on the view