If you head south of deep well, crowd does thin a bit, we usually go about 60+k's down the track, then camp about 100m or so off the track. This keeps the camp away from main track for dust etc when race is on.
Then you simply jump in the car, throw some chairs in and wander trackside for when the bikes and cars come thru., set up on trackside upwind, so not covered in dust.
Common sense prevails, dont sit on the outside of corners.
Can be chilly, a little rain is good as it keeps the dust down.
Have fun and enjoy a great weekend
Cheers Daz