The bands are being booked for the 2019 edition of Mates Day, a special fundraiser to support former and current service personnel fighting post-traumatic stress injuries.
This year, it'll take over the Burrumbeet Racecourse on November 9, and organisers are looking for some more help to make the day a success.
Chris Wilson, who organised the previous three Mates Days with Felicity Harte in honour of her brother, said this year money raised would be given to the Military Brotherhood military motorcycle club, which will be opening a support centre for veterans soon.
"It's for people affected by suicide and their families - it gets everyone together, and it raises funds and awareness for what returned soldiers are going through," he said, adding it was also for the emergency services.
"People are becoming more aware and understanding it more."
To find out more, or to volunteer, visit matesdayballarat.com.au.
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