The ground cover is typically tough grasses (looks like straw) the ground is often hard packed clay and dry cracked. A few trees here and there, flat mostly. The northern part of the range is quite lush with open forest and lots of litter on the ground.

They don't live in termite mounds nest maybe but not live. Most evidence I have found suggests they will take over a burrow eat the occupancies and then move to the next.

If you wanted really natural I'd look at some sort of cracked clay substrate (free of lime, natural clay) sealed somehow and planted Carex grass in tuffs. Carex looks good if it is alive but also if it is dead and dry it still does. I'd likely kill it once established. It is a lot of work.