HUNTER Valley and coastal producers say it will take years to recover from last month's severe weather, as more charities join in the recovery effort.
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Blazeaid is the latest charity to get on board, setting up a base camp at Dungog showground on Tuesday.
The small town was one of the hardest hit areas, with some farmers reporting damage to all fences.
Base camp co-ordinator Brian Carr said the team of 15 volunteers began work with farmers on Wednesday.
About 30 sheep and cattle properties have shown interest, with damage ranging from 100 metres to two kilometres.
"They'll be doing whatever the farmer wants," Mr Carr said.
"We work under the supervision of the property owner, so we could be helping clear the fenceline, roll old fences up and remove them, and help them put new fences up."
The flooding down the valley and out to sea dealt Hunter and Central Coast oyster farmers a heavy blow, and it could take up to three years for the region's oyster industry to recover.
Brigadier Darren Naumann, who's in charge of the recovery effort, spent this week visiting farmers, including the aquaculture industry.
The floods and storm activity wiped out a quarter of the Brisbane Waters 2013 oyster crop.
Gosford oyster farmer Dean Whitten, Whitten's Organic Oysters, has already started the massive clean up job.
When the storm hit on April 20 he lost two pumps, the wharf suffered severe damage and about $10,000 worth of stock in fridges and freezers was ruined.
He's had to put off his 15 employees and close his retail shop and seafood run.
"We had a 1.9 metre tide. With the ocean swell up plus all the rain the tide was a lot higher than it should have been," Mr Whitten said.
"The wharf was underwater and wave action hitting wharf did a lot of damage.
"Two-thirds of the wharf looks like it's been washed up on the beach."
Mr Whitten said oyster production would be impacted for the next two or three years.
"We were in the process of bringing the 2014 crop down for our nursery at Port Macquarie," he said.
"We've got two truckloads already but there are 40 more truckloads to come.
"We need to get up and running and get them down here because once they get overcrowded they'll stagnate and won't grow."
The flood response in the Hunter is continuing, with government agencies, non-government organisations and charities setting up camp to help landholders recover.
n Landholders requiring assistance with livestock disposal, damage assessments, lost or stray stock, or animal health and feed options should contact the NSW Department of Primary Industries Hotline, 1800 814 647.