Officers have also been re-tracing the 26-year-old’s steps in the days following her disappearance.
Wilga left a Fremantle backpackers on June 28 and left a voice message for a friend indicating she had hit the road and intended to leave Perth.
On the same day, CCTV captured her buying petrol in Toodyay – a small town north-east of Perth – before police believe she drove about 200 kilometres east to the town of Beacon.
Beacon is on the north-eastern edge of the Wheatbelt and has a population of just 123 people.
It acts mainly as a service centre for surrounding farms.
Wilga arrived in the town on June 29, where she was captured again on CCTV attempting to enter a closed general store.
A recent photo of Carolina Wilga.Credit: Facebook
Police believe from there she continued travelling east to Wialki, a tiny townsite about 30 kilometres from Beacon.
For nearly two weeks, Wilga’s family and friends were unable to get in touch with her.
Police put out a call for information on July 4.
Locals were asked to look out for Wilga’s distinctive two-tone 1995 Mitsubishi Delica van, and any sign of the woman.
Overnight temperatures around the Beacon area at this time of year can drop as low as 2 degrees.
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“Her vehicle was located at least about 35 kilometres inland from any main tracks, so it is dense around there,” Securo said.
The van was well-equipped, with water and solar panels.
Securo said it was hard to know if Wilga had taken anything with her, but police would forensically work through her car throughout Friday.
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