Dubbo's Trevor McAllister,83, received honorary life membership from two show societies in his lifetime.

Dubbo Show Society has been paying tribute to the man, fondly called TMac, whose brave battle with terminal illness recently came to an end.

Its long-time secretary Sue Hood has told of Mr McAllister's tenure as president of Dubbo Show Society setting a "very high standard" for the organisation's leadership.

But Mrs Hood said Mr McAllister had been a willing mentor to other presidents and supported everyone from chief stewards to volunteers.

"Trevor was a great person," she said.

"He never judged anybody and he was always there to give you good advice if you needed it."

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Across more than three decades Mr McAllister served the show society in multiple positions including patron from 2016.

Four years earlier he was awarded an honorary life membership, not the first for the humble and big-hearted family man.

At the age of 17, Mr McAllister joined the Deniliquin Show Society as his father had before him.

"He became one of the youngest presidents of that society and an honorary life member," wife of 57 years Pauline told mourners at his funeral service.

Trevor Grant McAllister was born at Deniliquin in 1937 and attended a Melbourne school where he excelled at athletics and tennis.

When he finished school and returned to the family farm, Mr McAllister played weekend A grade tennis and met the love of his life.

"...by some twist of fate I was drawn to play mixed doubles with him one hot Saturday afternoon," Mrs McAllister said.

"Over these past 60-odd years, I have had many, many reasons to be grateful."

The couple married in 1963 before welcoming three daughters and a son.

Mr McAllister was among the first rice farmers at Deniliquin but in the late 1980s he and his wife bought Adors Party Hire in Dubbo.

"Trev was in his element," Mrs McAllister said.

"He spent a lot of time conversing with farmers and organising their field days, and their daughters' and sons' weddings and 21^st birthdays."

Mr McAllister and his wife, also an honorary life member of the Dubbo Show Society, retired in 2008 but continued to travel the world and provide hands-on support to The Nationals, of which he was a member for 48 years.

The couple loved Christmas when "all 32" of their immediate family came to Dubbo, including relatives taken under their wing out of necessity and love.

In recent years Mr McAllister had used a "gopher" bought by the show society to complete his duties at the show.

"Trevor remained loyal until the end," Mrs Hood said.