The way from the R43 to the UCT parking place:
At 3.3 km turn left
At 5.6 km (from leaving R43) turn left
At 5.7 km turn right
At 6.9 km go straight (farmhouse on your right)
At 7.1 km turn right
At 7.3 km sharp left (after the bridge)
At 8.5 km parking place on the right.
In theory it is possible to drive another km, but immediately after the parking place above there is a dangerous bridge to drive over - even if it looks ok, it's possible that during your hike the river will rise and wash it away.