Moruya's Fire and Rescue rehabilitation van was only introduced in October, but has been baptised by the Currowan fire, travelling nearly 8000 kilometres already.
Firefighters have been driving the van from Moruya to Burrill Lake every morning, providing firefighters with drinking water, cold drinks and cooling chairs, Moruya Fire and Rescue captain Mark Gould said.
He said firies from Fire and Rescue, Rural Fire Service, Country Fire Authority in Victoria, and other services had taken advantage of the refreshments and resources.
After arriving at the 10am staging each morning, volunteers would drive the van through the "huge" fireground, provide the service and often distribute lunches provided by catering brigades.
He said SES was providing dinners to the volunteers.
The van crew would then return to Moruya by about 10pm to clean up and prepare for the following day.
Mr Gould said the van had been a handy resource and came at the perfect time.
At the Tathra fires, the situation was "pretty much fend for yourself".
Firefighters were filling up water bottles out of any tap they could find in the evacuated town.
He said fighting fires was easier with a cold drink and something in the tummy.
"Everyone's been very happy to see it pull up each day," he said.
He said the original plan for the Fire and Rescue van was to set up at a fixed area for a building fire or hazmat job, but the Currowan fire meant they had to travel a lot more.
"It's a little outside its initial design," he said.
The van also provided breathing apparatus cylinders.
Mr Gould said small and large businesses including Coles, Woolworths and Caltex, donated ice, fruit and vegetables, among other supplies.