Ms Gibbs said Mr Key should steer clear of an overly political address "for his own protection" because it risked inciting the protesters. She said the powhiri should be about the home people and the visitor, not the protesters outside the gates.
She was more critical of the protesters than Ngapuhi elder Kingi Taurua, saying many were using the goodness of the marae as a platform to get Mr Key to respond.
"It would be in his favour if he turned up and said nothing," she said. "That's holding more weight than responding to a bunch of catatonic, deranged people that have decided to fight about something they're really had three or four years to deal with."
Mr Taurua, who had opposed Mr Key attending, said the marae was expecting a lot of protesters to travel up from Auckland after the signing of the TPP. There was anger Mr Key had been invited on after a majority vote not to do so.
"If John Key is coming on I imagine there will be an attempt to stop him doing that," Mr Taurua said. "We can't do anything. If there's hundreds and hundreds there's nothing much we can do about it."
He believed the protesters should be there and as in the past they would be told to stay outside the marae. The marae was powerless to deal with anything that took place outside its gates so it would be for police to deal with.
The marae had spoken to police about security and would have the usual Maori wardens and plain clothes police on the marae, as well as uniformed police outside. Ms Gibbs said the marae had its own security on top of the police, including the Maori wardens as well as local volunteers. "I try not to interfere, they are there in the public interest."
However, the marae preferred not to have a visible police presence on the marae itself. "Often that sort of thing undermines the mana of the traditions and protocols. So it's best low key."
She said if people did misbehave "we just put them out of the gate and then the Pakehas take over with their flash policemen. Simple as that, don't worry about it."