So, they have addressed a missing piece of info .. where Russell and Carol stayed on the first night.
"They then travelled through Licola,
spending one night at Howitt High Plains before heading into Wonnangatta Valley on March 20."
And ... BBM
"Detectives are also keen to speak to anyone who was in the area of
Howitt Plains and Zeka Spur Track on March 19 or 20, and the
Wonnangatta Valley and Wonnangatta Station between March 20 and 24."
And ... BBM again
"Investigators
have been told that Hill took his drone with him but it is yet to be recovered."
I also like that they have now identified that there were people from 5 different states - they may even have their license plate info - in the area at the time.
And Howitt area has mobile phone reception - perhaps possible to pull from the tower any phone numbers that were in that area at the time.
Mobile Phone Coverage
Is generally excellent, especially on the higher ridges, and where there is a direct line through to Mount Buller. It tends to drop out in the gullies and can be patchy in the southern (more remote part) of this area.
Bluff - Howitt Area - WikiSki