Among the isolated backblocks of NSW’s Southern Tablelands, it is easy to disappear.

Indistinguishable gravel roads stretch on for kilometres; tracks are swallowed up by thick scrub; driveway gates are padlocked twice for good measure; rolling hills shield those beyond them from prying eyes; and cars seldom pass on the winding roads that lead to the many hobby farms in the area.

For those seeking an escape, the sparsely populated region offers refuge. For Naveed and Sajid Akram, such isolation offered an opportunity to hone the skills they would allegedly use to carry out Australia’s worst terror attack.

It was in late October that the father and son travelled to an isolated property in the area and allegedly undertook what police say was tactical training as part of their preparation for the December 14 attack at Bondi Beach in which 15 people were killed and dozens were injured. Sajid Akram, 50, was killed in a shootout with police. Naveed Akram, 24, who survived being shot in the abdomen, has been charged with 59 offences, including 15 counts of murder and committing a terrorist act.

Using satellite images and photographs of the father and son released by the Local Court of NSW, this masthead has tracked the Akrams to the property, about an hour from Goulburn, revealing for the first time a major part of the pair’s alleged planning in the months before the Bondi Beach massacre. Exclusive images of the property reveal the Akrams were shooting near several structures – including a caravan, a small transportable building and a shipping container – which appear to be equipped for long-term stays. A rainwater tank and an outdoor toilet are located near the structures, the images show.

Images of the property, captured from above, show several features identified as featuring in the court-released photograph of Sajid Akram, including Tree A, recognisable by its distinctive limbs, the gate – now closed, traffic cones atop the fence posts, a patch of dirt, and a hill.

The gate seen in the image of Akram is used to access a small yard enclosing the caravan.

Several sources provided information used to verify the location where the court-released images were captured, on the condition of anonymity owing to safety concerns. The images of the father and son, among few seen of the pair before the attack on Jewish families at the Chanukah by the Sea event, were contained in a police facts sheet made public after media outlets advocated for its release. The images were taken from videos allegedly found on the father and son’s phones, which police seized in the hours after the attack. The videos show the pair “firing shotguns and moving in a tactical manner” during firearms training they allegedly did on the property, according to the facts sheet.

Police in the days after the December 14 massacre searched the property where the Akrams allegedly trained. They were expected to return this week to conduct a second search. It is unclear if anything linked to the Akrams was found at the property during the initial search. In October, a local farmer briefly crossed paths with the Akrams when they were visiting the property, weeks before . They were polite and said little.