Stopovers
Some potential places to stay are:
YGLS - Giles - has roadhouse, avgas, you could also visit the weather station if you are so inspired
YWMC - William Creek - has pub, store (great burgers), avgas, caravan park
YWBR - Warburton - has a roadhouse with accomodation and food, shop, avgas
YCBP - Coober Pedy - another town with all facilities, careful where you stay if overnighting as had to walk from town to airport due to no taxi's or shuttle service
Hope this helps