With an eight million tonne-plus crop forecast, the best since the early 2000s, and Viterra delivery sites still looking for harvest workers, there are doubts about getting grain into the system in a timely manner.

Last season, 21 of the State's receival sites were closed and a further 20 open on a fill-and-shut basis, but this season all 108 receival sites will be open.

South Australian Farmers' Federation chairman Michael Schaefer said that on Eyre Peninsula, where very little grain was stored on-farm, croppers were ramping-up their storage.

"There will be some interruptions at harvest, because there always are, and for that reason those people that are getting on-farm storage are probably making a good decision," he said.

"People don't want their headers to stop."

Grower cooperative FREE Eyre is setting-up its own storage system on EP, south of Rudall.

Director Mike Wake said the four bunkers being built would have total capacity for 50,000t.

"We're also setting up a silo bag system to accommodate 30,000t," he said.

"Initially, only wheat will be kept in the bunkers, and segregated grain in the silo bags."

Storage was the co-op's second-highest priority, behind grain marketing.

"Because of the past two drought years, we didn't push the storage, because there just wasn't the grain around to make it worthwhile," he said.

"But this year, with the good opening rains, we felt the time was right and we actually ordered machinery and set up the finance (for the storage) in June."

* The Rudall storage site, 7 kilometres south of Rudall, on the Rudall to Verran road, will run a stickybeak day at 10.30am today.