Best of luck Paul. Wish you a wonderful ride!
Its actually interesting that you shared about your Thai friends saying there are bandits and robberies on this road. I wonder if these things are often just hearsay to spook each other out, or based on an event/events that happened. In some ways I am glad to not know these things, because then I just go without any preconceived thought or fear, however, if the report is genuine, then its always good to be informed.
A tricky one to balance eh! Anyway, I've only ever heard positive feedback about this road and experienced good things when riding there, so I am sure you will have a wonderful time on it.