UPDATED 4.39PM New Zealand First leader Winston Peters arrived at Waitangi but has decided to boycott Te Tii Marae today because the news media have been banned from covering events on the marae, including a political forum at which he was to speak.

Peters then got into an argument with marae officials about whether he was allowed to stand on the grass verge outside the marae while speaking to the media.

Labour and the Greens are inside the marae and Labour leader Andrew Litte said he will consider a boycott in the future.

Peters arrived outside the marae with at least four other New Zealand First MPs.

"It is not the fact that we are the greatest defenders of the New Zealand media but the fact is that this is not just about this marae. It is about Nga Puhi. It's about the whole country and the ban of the media is so counter productive.

"Worse than that, it is an abuse of their hospitality right that is conferred on them by the Nga Puhi people."

The Peters controversy followed the arrival of a hikoi of about 50 anti-P campaigners.

Mana Movement leader Hone Harawira has also spoken out against the Marae, saying what happened this year "can't happen again."

He said Te Tii was his home marae and he felt comfortable on it but said "I don't like what's going on."

He had been asked to help resolve issues but said he's not getting involved until the Waitangi commemorations are over.

Harawira said he wants to help plan for a better 2018. 

He and Maori Party president Tukoroirangi Morgan are due to announce an electoral accommodation this afternoon which will involve the Maori Party not standing against Harawira in Te Tai Tokerau.

Harawira held the seat from 2005-2014 but was beaten last election by Labour's Kelvin Davis.

Meanwhile, Gareth Morgan, leader of The Opportunities Party is defending his decision to go on to Te Tii Marae, despite disagreeing with the media ban.

Morgan said barring media prevents New Zealanders from being on board with Maori issues.

He thinks taking Waitangi celebrations on tour to Marae around the country would make the day more accessible.

But Dr Morgan said it was still important for him to to go onto Te Tii today.

"Just because someone starts throwing a hissy fit you don't go and throw one back at them do you."