Rotorua/Te Arawa TPPA Action Group chairwoman Marama Meikle said she was organising a convoy to head to Auckland , that included Mr Whata and Maori Battalion B Company veteran Robert Gillies, the last living B Company veteran, who is in his 90s.
She said the "peaceful, non-violent" protest march would start in Aotea Square at midday.
"We support trade, but trade that works in the best interests of all and not that of a select few. "This so called trade deal is about usurping people's sovereignty and making them subservient to the wants and desires of the multi-national corporations behind this deal, which is led by the United States."
She said she was worried the deal could allow overseas companies to override New Zealand law to serve their own best interests and leave future generations at the mercy of outside influences.
Rotorua Labour Party spokesman Tamati Coffey said he also had grave concerns about the deal and members of the party would be heading to Auckland to join the protest, "knowing that it'll give global big business unprecedented bullying powers within our country"