Nant is VERY icy. I've been aroudn the Pendam this morning and all the fire roads are COMPLETELY iced over:
Singletrack is rideable although I can't account for Zoro as we didn't fancy the leg burner if it was an icerink. The top section was bad enough. It's now raining heavily (I live a couple miles away), so I don't know whether this will add to the problem or not.
If it's not too far to drive, then go ahead. It's fun but slow and different. More sketchy icy fun than a good thrashing.