SO I thought I better update this
I'm a member of the Top END 4WD Club -- https://topend4wdclub.asn.au/
I have found the club a great little club of about 50 members or so -- lots of weekend trips and social events and a rather family orientated club.
Blurb from the club's web site -->
The Top End 4WD Club Inc is open to anyone who own a 4WD vehicle. The aims of the club, according to the constitution are to:
- Promote, encourage and foster interest in all 4WD vehicles
- Promote and arrange field trips and social events for members: and
- Arrange discount facilities
Other Clubs in Darwin --
Toyota Landcruiser Club Darwin http://www.tlccdarwin.com.au (They are good people as well)
Other clubs not so sure of -- maybe someone else can post more info here.