Harrismith to Piet Retief and back via Ermelo

I am planning a 5 to 6day trip to Swaziland end August/ beginning September.
We gonna trailer our bikes to Harrismith.
I need help with gps routes between Harrismith to Piet Retief and then back from Swaziland via Ermelo to Harrismith.

Day 1 will be Harrismith to Piet Retief.
Days 2, 3, 4  in Swaziland.
Day 5 perhaps the Kruger fence route and then Day 6 back from Ermelo to Harrismith.
We have never been to that area and would appreciate any routes, accommodation info etc.
We prefer 2 spoor, single track and routes that are more on the technical side but any info is welcome.

Thank you