Mrs Everett, also a seamstress and co-founder of the Buckingham Belles, said she never would have believed her link with the post office would have lasted so long when she was first approached by New Zealand Post in 1987 to create Edwardian period clothes in honour of the renovation of the building, built in 1915.
The celebration won a tourism award a year later and the costumes are still used by staff of the Lakes District Museum, which took ownership of the post office and service when NZ Post withdrew in 1995.
The service has battled on ever since with Mrs Everett at the helm since 1991.
Postal services, including utility bill payments and car registration, were added to with the sale of gifts and stationary.
The post office serves more than 400 customers a day in summer and about 200 a day in the quieter seasons.
Envelopes and parcels sorted by the team have increased because of the growing popularity of online shopping.
Generations have grown up around the post office.
Mothers tend their babies while catching up with the news.
Mrs Everett and team also serve as an early warning system and check the welfare of senior citizens if they don't make their customary visits to the post office.
''It's an end of an era,'' Mrs Everett said.
''It gets under your skin and I think it's the community more than anything. The people are amazing.
''If they hadn't saved [the post office] we wouldn't be here.''