Rebecca Coriam was 24-years-old when she went missing from the Disney Wonder liner she was working on as it sailed off the coast of Mexico on March 22, 2011.
Her parents Mike and Ann Coriam, of Guilden Sutton, have vowed to discover what happened to her, but say they now need to focus on securing an inquest.
Ann told the Chronicle: “This will be the last event. It has taken its toll on us over the last few years and we have had an awful year.
“We have got to try and save our energy for the fight for the inquest.”
Family and friends have clubbed together to buy two benches – which feature engraved plaques – and a mulberry tree in Rebecca’s memory, which will be placed and planted in Grosvenor Park at a special event on Sunday, September 13.
The park was chosen as the location for the lasting memorials because they made many happy memories there with Rebecca.
“Rebecca used to compete in triathlons, and ran and cycled through the park. Her friends still go there regularly,” Ann said.
Ann explained that in the absence of a grave for Rebecca, the benches and tree will serve as somewhere her loved ones can go to pay their respects.
She added: “Because Rebecca has never been found, we don’t have a grave for her so it has been difficult.
“We thought the park could be a base for everybody to go and reflect.”
One bench will be placed by St John’s and the other will sit at their ‘favourite spot’ near the pond overlooking St Werburgh’s, their family church.
The event starts at 2.15pm, with the placing of the benches and tree at 2.30pm, followed by light refreshments.
All are welcome. If you would like to attend, please RSVP by calling Ann on 07723473670 or 01244 342793.