Its a real pity about the OPR, you can read up more on 4x4community what specifically lead to its closure. I tried to ride a 2 day circular route including OPW in Sept 2019, the Doring was flooded both on the OPR crossing at Tankwa and back at Uitspankraal, despite my windgat insistence that I "had crossed rivers before", Mr van de Merwe from Welbedacht who owns the first tea plantations from the Biedouw side said there was no way I would get across, he was right. He directed me across his farms to Wuppertal for another equally beautiful circular ride which his son had done on an mtb. The area on the plateau was very wet and it was clear where the motorbikes had again gone through his rooibos to avoid the flooded road. The through route has been closed at the farm Agterfontein where the district road becomes a farm road. These are decent accommodating folk who were left no choice. There's a relatively new crowd at Uitspankraal crossing of the Doring, they rent dirtbikes, sell cold beer in an outside bar, have a big screen TV with motogp showing 24/7 - they have a different outlook to the farmers who have been in the area for generations who grow and sell rooibos tea. Sadly for people touring on bicycles the route has also been closed. Re the Tra Tra River route from Wuppertal to Tankwa as an alternative, a friend did that a few weeks ago. There is quiet a bit of portage to get through the last part where the track ends. That's where the Uitspankraal dirtbikes gave up. So with it being impassable to dirtbikes hopefully it stays open as an alternative to bicycles. Hope this helps with your planning, the Doring level should be easy now.