Pulp the Mill protest organiser Lucy Landon- Lane said yesterday that there had been a good response so far to the call for participants.

She said Sunday's protest would be the first of a long campaign over the next few months with a big rally planned soon.

It comes after federal Environment Minister Tony Burke last week granted Gunns permits for the last three modules of its environmental impact plan - effectively clearing the way for a start on the $2.3 billion mill.

Anti-pulp mill speakers at next weekend's protest will include Tamar Valley resident and gardening personality Peter Cundall, Hobart author Richard Flanagan and Bass Greens MHA Kim Booth.

It is planned to take place on the proposed pulp mill site.

Participants have been told that last time protesters went on to Gunns land, the company had asked police not to arrest them.

But it will be up to individuals to decide whether to comply with any orders by police to leave the site.

Gunns managing director Greg L'Estrange said last Friday that the company acknowledged the right to peaceful protest but he hoped that people would show a level of maturity and safety.

Gunns share prices fell further yesterday after Friday's announcement on the permits. Yesterday prices started at 55¢ a share and closed at 49¢.