We hiked up past sleeping beauty cave (standard route from the car park, snow all over the place). We went past sleeping beauty cave and climbed the steep bank on the left side (Southern side of the river, probably East facing) of the river. We crossed the river after about 500m and kept on the south facing bank. The bank was steep but very scenic (not too steep to manage though). I don't know the definition of where a pass starts, but in my opinion it starts once you are hiking between rock face (hence passing through them), in which case we reached the height of the start of the pass, but we where at least 100m away from the river (on the South facing slope).
We then hiked up the bank between the 2 passes (I have to say that the view when on the outer most part of the ridge was incredible (we where looking down into the hidden valley, I could even see the rocks above the cave I named "I'm sure it's not a" Cave, we could clearly see the ridge in which Pillar cave is found, we could see Grimm's Castle, Swiman Rock, Mlambonja Peak, Random Peak and the last 2km of the Rhino Peak hike looked like the 200m height gain that it is (as opposed to looking like a short steep uphill section)). There is a large flat area which would be awesome for camping in, its flat and high, but has rocky outcops nearby, so it doesnt look like flash floods, rock falls or lightning are big issues.
We then hiked down the Willsons Pass river (but once again high above the river gulley). At the point where the river changes directions (that sharp 30 or so degree turn) we crossed the river. The river is in a steep gulley surrounded by rocks, we couldn't see a way through (we found what is probably an eland path, but it lead us straight to a 3m high rock face on a steep bank). Thats where we eventually turned around and hiked up the steep bank we had come down, we then dropped down the south facing slope above sleeping beauty cave (probably about 50m west of the unnamed rock feature which is west of Swiman Rock). It took about 40 mins to drop the approx 80m bank which mut have been at a 70 degree angle, on the bright side, whenever we slipped on the snow covered bank, you stopped falling before you gained any speed - no damage is done when falling 10cm! We then returned past sleeping beauty cave on the route we started on.