UPDATE: Sandra Longeaud has been located.
Police will launch a search on Wednesday as they search for a French tourist whose camping gear was found abandoned near Cooranbong.
Concerned campers got in touch with a National Parks and Wildlife Officer on Monday after a tent and two sleeping bags went unattended at Martinsville for about three days.
A check of the items revealed their owner as 27-year-old Sandra Longeaud, who detectives have been unable to contact.
Teams are gearing up for a co-ordinated search near the Bangalow camping ground at the Watagans National Park.