Eight people helped RIA staff plant and fence areas on the island from July.
Mentor Tristan Duke said the group of unemployed Aboriginals was volunteering in a place that had a chequered history in their culture.
Mr Duke, of Wembley, said the participants had made friends and some had already secured jobs.
‘The employment agency is seeing the positive changes in them,’ he said.
‘They’ve worked really hard.’
Team leader Alan Sambo was managing a group for the first time.
‘A lot of these people are from tough backgrounds, and we help get them out and about,’ Mr Sambo said. ‘Lots of people want to join the group now.’
Mr Duke said the inaugural initiative had given them ideas for next year.