It is really cool if it's still the same.
They bus you out to the start at Posberg lands end and you run through the reserve on beautiful undulating roads to Langebaan. The half starts near the bird hides and follows the same route to the end from half way.
A quick climb up the only real hill, through the 'burbs to the estate finish and you're home.
No logistics, beautiful and relatively easy.
10 out of 10 recommend.