If you find yourself in Perth, with decent weather (overcast but not rainy is best), this is also pretty amazing. The dirt road portion can be rough; ride is smoothest in a 4WD. I went there on a dual-sport motorbike, which I can also recommend.
And Kalgoorlie is just as weird as you imagine. The mining museum was pretty good when I was there.
ETA: Definitely check the weather. February is the southern hemisphere equivalent of August, and if the weather wants to be “frying eggs on the dashboard” hot, it’ll do exactly that.
