Warraweena, North Flinders, plenty of history (ruins and 4wd tracks ranging from easy to medium) You must book though, very few sites and very popular. Non powered sites. Call Stoney
http://www.warraweena.com/40km south of Leigh Creek, Shopping Centre and Fuel.
You travel via back tracks from Blinman to Warraweena instead of the hwy. Ensure your prepared though.
Bendleby Ranges, South Flinders, surrounding history (ruins and 4wd tracks ranging easy to medium) You must book, very few sites and very popular. Non powered sites.
http://www.bendlebyranges.com.au/1.5hr south of hawker. 1hr North of Orroroo Shopping Centre Fuel
Easy back dirt roads/tracks from Bendleby to 10 km's south of Hawker.
Merna Mora, Central Flinders, surrounding history (ruins and 4wd tracks easy) powered and non powered sites. You must book.
http://www.mernamora.com.au/40km north of Hawker (local store and fuel)
These are all working stations and booking is essential.
Just to name a few good ones at the top of my list, there are many more
If you're heading further south, non tourist back tracks east of Mt Bryan which is 1/2 north of Burra, a few hidden ruins in the valleys, better than tourist ruins.