Prabhdeep Srawn has been missing in the Snowy Mountains of New South Wales for more than a month.
The family has been conducting a private search for the 25-year-old hiker from Brampton, Ont., after the official search wound up two weeks ago.
Tej Sahota, whose wife is Srawn's cousin, tweeted early Thursday that some of the Canadian soldiers heading for Australia have extensive experience in the mountains of Afghanistan.
He says the soldiers are going on their own free will and not in any official capacity.
Earlier this week, the family doubled the reward for rescuing or recovering Srawn to $100,000.