I found Big Desert pretty hard to plan a trip though, without having been there before its hard to know what the sand and tracks will be like. This is the route I came up with for our first trip there and I put together a video documenting the difficulty of the tracks we drove and the campsites we stayed at.
https://www.youtube.com/watch?v=CPC4NLF9ah4
Attachment 85021
Maps Route - https://goo.gl/maps/RLqHKRcSqzAtWu4b6
Campsites:
Night 1 - Schulzes Beach, Lake Hindmarsh
Night 2 - Stockman's Campground
Night 3 - Western Beach, Lake Albacutya
Night 4 - Snowdrift Picnic and Camping Area