This is a nice trek, but it is mor about the vies than about the waterfall. The half hour or so it is continuously up the mountain and then straight through the bush. At the end you have to cross a river. You don't really need a guide, if you have your own car to get here, since there is only one path and probably other hikers. The hike itself is probably pleasant if the sun is out, and the views must be spectacular, we barely saw anything, because it was pouring from the heavens.
If it rains, really really think twice if you want to do this. We were well prepared, with good hiking boots, hiking pants and rain pants on top, rain jackets and ponchos if we needed them. Our bags were waterproof. However while we had ben told that we should prepare for rain, nobody told us that we would have to walk through almost hip deep water (well less really, in between knees and your bottom). We has managed to keep dry until that and three days later our shoes still haven't recovered from the water we had to march through for a good hour. More