I think it's a massive long shot that he could have been kidnapped or be in a commune, although like everyone else I really, really hope that's the outcome. What I was saying is that if these gypsies who live in the bush are responsible for Theo being killed whether some kind of argument, accident etc. then his body would have been found in that area by now. These people I imagine don't have cars, so how could they possibly move a body away from the area?
If these people do sell drugs then who are the ones in town who give them their customers? Are staff at any businesses involved, bars, hostels etc. most backpackers are in BB for the first time, so who do they ask? Could one of these people have been involved too and have a car? Somehow it seems that a car has to be involved somewhere at the very least 'after' the event. We pretty much know it wasn't before the event, so how and why after it? This scenario is makes sense if you accept that after all the searches, dogs etc. then he is no longer in the vicinity of that phone map.
But even if something had gone wrong then it seems weird that someone with a car would be contacted for help and become involved (unless they were somehow involved from the beginning).
It's also possible that someone amongst the gypsies/homeless has a car permanently in that car park. I know that there is a homeless man who lives along the creek near where I live and he has an unregistered car parked on the main road which he moves once a day to another location so it's not reported as an abandoned car.