Hi Glen,
Yes you can park your car in the imaging field, and even camp next to you scope of you like. The imaging field is now about half a football field in size. We just ask people with vans or large tents to camp around the edge of the field near the tree line, just so the best imaging spots aren't obscured by a mobile Taj Mahal.
You can get an idea of the field layout from Google
https://www.google.com.au/maps/place...ca8572429760ef
Trev.