Good stuff. Was in for the 50 last year before injury withdrew me.
Haven't done the run but Tarra Bulga is gorgeous. Best insight I can give is don't expect the kilometre markers to mean the same as a road race. I know the 50 went something like 54 or 56 last year.
Enjoy. Look forward to hearing the reports. There's always plenty from our running group down there.
Cheers, thanks mate. I'll let you know how I go