I live in the highlands and have done 2 club style races on it in the past 18 months. Lots of log rolls, no long climbs, no massively long flow, little stop/start but a nice shortish 6km loop, does have some good variations and of course no fire road. Good event centre and obviously you don't get much chance to ride it.
SHCC always puts on a good race and it will be a good atmosphere. Check out the Southern Highlands cycle club website, their might be some info there about the track.
I am not riding on Sunday... But would have if I hadn't decided to stop after the fling for a break and have only just got back on my bike this last week.