Can't help with where to leave the van, but as for the bloomfield track, last year when did the track it was basically a road, there were some very steep sections that the local council were in the process of concreting. There was one or two very shallow creek crossings where you would have been lucky to get the wheels wet, and of course the weir across the bloomfield river. I dont believe your avan would have problems with any of the track, particulalry if it was dry.