Have you consider travelling through Botswana. You can enter SA at Derdepoort north of Gabarone. Madikwe is close to this border gate. From there travel to Thabazimbi,
If you rather want to miss border crossing Vryburg should be fine for a stop. I am thinking of stopping either at Van Zylsrus or Vryburg myself. There is a campsite a few km before Vryburg and Boereplaas Holiday resort on the way to Mafikeng. Haven't stay there myself, but will play with time and not book. You never know what you will see on the day you are leaving KTP.
A friend of mine will stay at Urikaruus when you are there early Dec. He was planning to stop en route to Secunda so maybe he did find a nice place.
Other option is Red sands at Kuruman, but it all depends what time you left KTP if it will be too early.
Chat to you next time at a leopard / lion sighting.
Message from BJ who forgot to logon.