Hello Marty,
There is a new and very active Triumph club in Adelaide!! You are more then welcome to join. We have monthly rides and these are GREAT social events. The area around Adelaide is perfect for bikes and our rides, generally about 200 to 250km in length take in beautiful winding roads through the Mt Lofty Ranges and coast as well as faster roads with nice long sweeping bends. The weather is usually very good and it is rare that a ride is cancelled - summer or winter.
There is a local Triumph dealer and, personally, I have only had positive experiences with them. However, I have found a VERY good private mechanic (an Englishman) not far from where I live. He works from his home but he is VERY good.
here is the link to the Triumph club in Adelaide...
http://www.triumph-riders-club.org.au/
We look forward to your company...
Regards
Hans