Logo cache is tough to get to by any means. You'll be hard pressed to make it in one day by mountain bicycle from Piet Retief. If you go for it don't leave Piet Retief - Amsterdam tar road before crossing The Ngwempisi River. It's better bet to start cycling from Amsterdam. Leave your car at local Police Station. Then pedal up Nerston road, the higher you get the better.
Even if you go by 4x4 vehicle or bakkie, set aside one whole day for this expedition. Don't forget to mark your Waypoint on leaving tar road. It is very easy to get lost in that area.
No effort was made to conceal the cache as for sure nobody will come strolling into place like that.