Hi Ben,
My partner just made that move with her Skyline and knows how you feel
I have a GPS tracker in my car but I concur with the above, if some flog wants your stuff you can't do shit about it...get a good insurance policy and the rest is auxillary protection. Cars are getting stolen from locked up basement carparks these days and towed away with flat beds. It's sad but that's the world we live in. Some 34 owners even enlist the help of security guards
Keep an eye on events section and check out SAU Vic, the paid membership club, as they do some motorsport and social events you might like.
Not sure about 34R specific clubs but could be one around, heavily guarded of course.