Humidity not so bad here, more up North/East region is Called Natal and the biggest city is Durban.

Thanks for that part on the mud. You had me rolling and tears in my eyes with laughter...The same here

We also use cement block here about the size of 1.5 bricks long and 2 high. Here I used then for a vegie pad.

Click image for larger version.  Name: aa blocks.jpg  Views: 217  Size: 373.2 KB  ID: 24599

In winter I cover it with thick plastic sheeting.