A midday march through Roxburgh will begin in Abbotsford St and finish at the Memorial Park's band stand, where Dr Macpherson will read excerpts from emails and letters in support of the initiative.
He said people from throughout New Zealand had contacted him to express their support for the march, which aims to change politicians' minds in order for the camp to stay open.
In October it was revealed New Zealand's seven health camps faced a financial crisis, which would force the closure of Roxburgh's camp unless $5 mil-lion was made available from the Government.
On October 24, camps chief executive Dr Fiona Inkpen decided to delay making a decision about closing the Roxburgh camp until the outcome of an independent financial review, expected to be completed this month.
Dr Macpherson said Dunedin City councillors contacted him in support of the march, along with Invercargill City Council staff, every mayor in Otago, National Party MPs, and Dr Inkpen herself.
"Fiona rang me and said she felt positive about the outcome of the protest and she really appreciated the support locals have given to the camp. I think she's finding it genuinely useful in her meetings in Wellington to be able to point out how much support for the camp there is."
Hundreds of people are expected to take part in the march. Dr Macpherson said Roxburgh would be a stronger community as a result of the protest.
"The buzz about this has been building during the week, and it tells me this isn't just an empty gesture. We've got the chance to change people's minds and I'm convinced we will make a difference."
Roxburgh's camp members and staff, Volunteer Fire Brigade members, school pupils, tea-chers, community board members, and workers from the area are expected to take part.
Two men from the health camp's first intake - Richard Beeby (75), of Alexandra, and Seaton Mills, of Balclutha - will also march.
