It is never dry and there are multiple stream crossings, so it is not a ride to do if you are not ready to get wet.
In the summer the ferns can be a nightmare, so personally I think the best time is when its frozen, or just in the winter as you expect to get wet and muddy then anyway.
It is very, very quiet and absolutely stunning,
It couldn’t be more different to a trail centre, so if you are expecting long, flowing singletrack you will be disapointed. Lots of start/start, lots of little mini technical bits.
There is a shorter version that skips the upper section and due to the major water damage on the fireroad that accesses the full doethie I would recommend the shorter version. You still get all the best bits of the singletrack IMO, but skip more of the unrideable bits.