While some laughed it off as merely wishful thinking, Mr Winchester was not taking chances of missing out on seeing his beloved Raiders in the big dance.

After the Raiders' thrilling 16-10 preliminary final win over South Sydney on Friday night, Mr Winchester's faith in the Green Machine has paid off.

With the Raiders qualifying for their first grand final since 1994, the green sausages, bread, coffee and all manner of things that probably shouldn't be green will continue to flood the territory.

Mr Winchester admits supporting the Raiders has brought more than its fair share of disappointment over the past two decades but he said that's only intensified the excitement among the Raiders faithful.

"There's been a lot of lonely games at Bruce Stadium in the cold watching them get flogged," the Raiders stalwart said.

"The first game I brought my son Harry to they lost 68-4 to the Melbourne Storm, 'welcome to the Raiders' I told him.

"But if we win on Sunday, it'll all be forgotten."

Recognising the invaluable contribution the fans have made to the team's finals run, the Raiders will be throwing open their doors to training on Tuesday and inviting members to watch.

Members will be able to be photographed in an exclusive team photo with the grand final squad and the first 500 members will receive a complimentary Green Machine sausage sandwich.

Raiders chief executive Don Furner said "this is a wonderful opportunity for our most loyal supporters to wish the team all the best in what will be the biggest game for our club in 25 years."

Mr Winchester has been a member of the club for 15 years and ran the Raiders Army supporter group for several years, transporting bus-loads of fans to away games in Sydney.

"I've made countless friends supporting the club and I can't wait to enjoy Sunday, and hopefully Monday, with as many of them as possible," he said. "We have shared a long journey together."

Growing up in the Raiders' spiritual home, Queanbeyan, Mr Winchester was introduced to the team at a young age with his grandfather religiously attending every home game from 1982 onwards and bringing the family along with him.

"As soon as my kids were born they were signed up as members," he said. "They didn't get a choice." As a Queanbeyan-Palerang councillor Mr Winchester has been campaigning for years to get the team back playing more footy at Seiffert Oval.

If the Raiders get over the line on Sunday, Mr Winchester said there's only one spot to get to on Monday.

"The Toppy (Hotel Queanbeyan) will be heaving. If you're from Queanbeyan or not, we welcome all our brothers and sisters in green."

Members hoping to see the team off at training on Tuesday should head to the Canberra Stadium west entry with their membership cards. Gates open at 9.30am and the event finishes at 11.30am. Ticket sales to the grand final were put on hold on Sunday and will reopen at 10am on Monday for members.