Activists planning to occupy Forrest Place in Perth during the Commonwealth Heads of Government meeting admit they are nervous after a similar protest in Melbourne this week was dispersed by police.
Occupy Perth participants say they intend to peacefully camp indefinitely in the centre of the city.
The Premier Colin Barnett issued a warning to Perth protesters after police used capsicum spray to quell the protest in Melbourne.
Luke Skinner from Occupy Perth says they will join forces with a group planning a protest march on CHOGM next Friday.
But he says the Melbourne events have made him apprehensive about the response they'll attract from authorities.
"It's a tough balance because there is a good reason to be out protesting and especially it's a really good time to be doing it because how often does Perth have a meeting like CHOGM," he said.
"But I don't think really there is any reason for the authorities to be concerned."