First Nations leaders from NSW, Queensland, South Australia, Western Australia and the Torres Strait gathered for the the Uluru Youth Dialogue ambassador program over the weekend.
Co-Chair Bridget Cama said young people would play an important part in the referendum having success.
"Our young people are committed to this pragmatic reform that will achieve a better future for First Peoples and for this country," said Ms Cama.
Some polls have put support for the voice amongst young people almost as high as 75 per cent.
But recent polls have shown overall support for the voice waning, with four states on track to vote against the proposal.
A Sydney Morning Herald poll shows NSW, Queensland, South Australia and Western Australia voting 'no' at the referendum, with support in Victoria and Tasmania only slightly above 50 per cent.
Four of the six states and more than 50 per cent of all Australians need to vote in favour of a referendum for it to succeed with a double majority.
Renowned Indigenous activist Noel Pearson has issued a call to arms for the 'yes' campaign, saying success wouldn't just "fall into our laps".
Mr Pearson said the 'yes' campaign had its work cut out but could draw upon momentum.
"We need to be at the railway stations, we need to be at the town halls, we need to be meeting people in the malls and we need to be appealing to the better angels of the Australian nature."
He said a 'no' vote would leave Australia "in the darkness".
Deputy Liberal Leader Sussan Ley said while she supported legislating an advisory body that would focus on local communities, enshrining it in the constitution would be legally risky and add "unnecessary bureaucracy".
The government has denied the voice would stall legislation or the decision-making process with High Court challenges.
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