Kate McCulloch is the lead Senate candidate in NSW for the Pauline Hanson-helmed party which took two Legislative Council places with Mr Latham and former policeman Rod Roberts' success at the state poll in March.

"I rate a real chance I think, because I'm not fake, a lot of people do know me," Mrs McCulloch said.

One Nation's top Senate candidate in NSW at the 2016 poll, Brian Burston, won but subsequently defected and will be a rival to Mrs McCulloch as the lead Upper House contender for the Clive Palmer-funded United Australia Party.

Mrs McCulloch was the lead candidate on One Nation's Tasmanian Senate ticket in the 2016 election.

A television expose of One Nation chiefs travelling to the US to meet gun advocates is being blamed for the party's support recently dropping to four per cent.

Mrs McCulloch labelled polling "irrelevant" and said One Nation would "never soften" firearm laws.

"We don't take notice of polling," she said.

"They never thought we would get two into NSW and I was predicting we would scrape in two."

Mrs McCulloch, a 56 year-old grandmother, has been part of One Nation for 12 years after having been a member of the Liberal Party for three weeks and leaving because of what she perceived as a lack of democracy in preselection processes.

She is standing for a variety of reasons including fuel and utility pricing, housing affordability, unsustainable immigration and lack of government services.

On the Murray-Darling Basin Plan, Mrs McCulloch wants it terminated and a Royal Commission into water administration.

"The rules have been totally unfair to NSW and the whole authority has been a total waste of money," she said.

"We have farmers not able to grow fodder to feed our livestock."

Mrs McCulloch said Senator Hanson would be joining her on the election trail in the southern Riverina.

"She definitely is coming to this area, she's going to be in NSW for about four days and this area," she said.