After an agonisingly narrow defeat at the last federal election, Gilmore candidate Andrew Constance has dusted himself off for another shot at Australia’s most marginal seat.

Pre-polling suggests he may again come up short but the former NSW Treasurer is keeping the faith heading into Saturday's election day showdown with Labor incumbent Fiona Phillips.

Community independent Kate Dezarnaulds, The Greens’ candidate Debbie Killian and One Nation nominee John Hawke are also expected to play a crucial part in the final count once preferences are distributed.

“People are quite complimentary by the fact that I haven't walked away and I'm still fighting fighting for them,” Constance said.

“We will continue to fight hard on issues to support people financially during the cost of living crisis that everyone's in. Inflation is such a huge issue with this election."

Constance also points to housing, development and the controversial windfarm proposal for the Illawarra coastline as major issues that will be on the electorate’s mind when they are in the ballot box on Saturday.

“There is such a significant number of people who are undecided and polls are not always indicative of what happens with elections,” he added.

“I think given the very significant undecided vote, our internal research is saying that the people will make their mind up at the very last minute. It would be brave to come out and predict the election result.

“It's a big seat - 200km in length from Kiama down to Moruya - there’s different issues in different towns and that means that the election campaign can be very localised and very focused in that sense.

“We've got so much to do in the region and a good plan to deliver and that's what I hope to do.”

Constance has been forced to endure a bumpy week in the lead-up to voting day.

He was forced to respond to claims that religious extremists had infiltrated the Liberal Party’s volunteers at pre-polling booths in marginal seats, including Gilmore, and a funding announcement at Sanctuary Point with Opposition Leader Peter Dutton was disrupted by three anti-nuclear protesters.