The Wakatipu Community Maritime Preservation Society is inviting boaties and the wider community to the event on Lake Hayes, between 11am and 4pm on Saturday.
A dozen sailing enthusiasts were expected from Dunedin, society treasurer Alan Kirker said.
The group has applied to the Southland Community Trust for another $200,000 from the trust towards the restoration project. Mr Kirker said the trust had pledged $102,000 three or four years ago.
The project had also benefited from $120,000 to $140,000 in professional fees "in kindness" from Queenstown architects and engineers.
The society aims to raise $700,000 to restore the boat shed and shipping and ticket office to working order as a heritage museum. The office was built between 1866 and 1876 near the corner of Hay and Beach Sts, Queenstown.
It was used as a storage shed, then by the Lake Wakatipu Steam Shipping Company and then New Zealand Railways.
In the mid to late 1930s, the office was moved alongside the boat shed at Frankton marina, on Sugar Lane.
The boat shed was built in 1934-35.
