It is estimated about 150 fully patched outlaw motorcycle gang members will arrive in Darwin for what is the Hells Angels Motorcycle Club's annual rally.
More than 30 police vehicles carrying ordinary officers and Territory Response Group members were seen driving down the Stuart Highway from Darwin to Katherine yesterday.
Sources told the NT News the officers were being sent to the South Australian and Queensland borders to "greet" the bikies as they roll into the Territory.
Hayley Roddy, 25, of Parap, was returning from a Mataranka camping trip when she came across swarms of officers in Katherine about 11.30am.
"There were more cops than regular people," she said.