I reckon that would of been likely for many of their rendezvous, CC lived alone and her neighbour I think was familiar with RH.
However on March 11-13 LE say RH was alone and seem to have traced him quite specifically, asking for public information about two particular bush tracks.
Source: A Current Affair Article
"Following an extensive investigation, detectives are widening the net of people they want to talk to and say they are particularly interested in hearing from anyone who passed or stayed in the following areas:
- King Billy and Bluff Track between March 11 and March 13, where Russell camped alone;
- Howitt Plains and Zeka Spur Track between March 19 and March 20; and
- Wonnangatta Valley and Wonnangatta Station between March 20-24."
Source: Herald Sun Article
"Something that puzzles Mr Ashlin about the mystery is why Mr Hill went camping alone in the area of the King Billy and Bluff Track between March 11 and 13 before the pair’s trip.
“He never said boo about it, it was a surprise,” he said.
“I don’t know why he went on that trip, it was only an overnight stay, and a six-hour drive each way. There is something strange about it. Robyn can’t work it out either.”"