As long as I am not away when you are here be happy to lead for a bit.
There is a BMW club here they mainly ride GS bikes and they do lots of touring off the beaten track stuff where S models fear to tread.
Here is a link
BMWMCCWA
This hotel in Norseman on your route cost me $35-00 on my third night of my trip. Seems to help if you dont need a reciept to get a good price in some of the hotels. Put my bike around the back locked away too. Usually get a good meal for reasonable price too.
This hotel is not on your trip but some more examples of the architecture. My old RS and my friends other bike a Lemans
Yalgoo, again looked after our bikes safe and secure.
Mt Magnet
Kalgoorlie also has great Architecture form Gold Rush days
6.30 am and a days riding ahead!
See you are from Austin a friend of mine has moved there. As mentioned by others will be very hot at this time so water a neccesity Austin gets very hot so I guess you know about the heat.
Graelin