New City Vision (NCV) submitted a planning application to build 90 townhouses, mews and flats on disused playing fields, known as North Kelvin Meadow, in Glasgow's West End on May 8.
As revealed in the Evening Times in August, the firm behind the proposed development, on the site between Clouston, Sanda and Kelbourne Streets, delayed publicly unveiling the plans as they were being updated.
But the Save the North Kelvin Meadow campaign, which came about after the site was earmarked for construction in 2008, is calling on developers to withdraw plans altogether after launching a series of events for children.
The campaign is also being backed by River City and Taggart actor Tam Dean Burn and the Children's Laureate and Gruffalo author Julia Donaldson.
Emily Cutts, 34, who lives near the meadow, said: "We have not seen the current plans and it is odd that we haven't. We just want to know what the story is.
"The developers keep saying the plans are going to become available but we haven't heard anything.
"We want to keep the green space the way it is. We just do not want the land to be built on."
The mother-of-two said the group has been holding events in the Children's Wood area of the meadow which up to 300 youngsters and adults have been attending.
She added: "All walks of life use this space – from children and parents to older people – and it's hard to find a community space like this in Glasgow.
"People from different areas use this space, from Maryhill and the West End, as far out as Ruchill.
"We are building a flourishing community with an increasing number of local people and organisations involved."
The group expects about 150 children and adults to descend on the lit-up meadow tomorrow from 4.30pm for a free Hallowe'en event.
Supermarket Tesco has donated food and the local North Star Cafe will make up dinner boxes for the youngsters.
Mr Dean Burn added: "As a parent of two young children, I can appreciate how important it is for them to connect to nature. Glasgow should be proud to have such a wilderness for the community to flourish in and do all they can to save it."
NCV director Harry O'Donnell said members of the public would be able to view the full details of the plan "in due course".
He added: "We are going to continue with the proposals which have been amended to include more green space."
A spokesman for Glasgow City Council said the application would not be progressed until the plans had been made public.
He added: "When the application is available to view online, interested parties will have a period of 28 days to make representations."