Hi Justin, I think you're leaving a great place (Dave's flying school at "The Oaks") and heading for a great place (Coldstream). I did my GA to RA conversion with John and Dave and now have a jab I keep at "The Oaks" (you may have seen it "55-1837"). Always good people around the place and when I go out for a quick fly, generally end up finding the whole day has gone before I get home.... that's just the way it is.... and they are great days!
Anyway, I travel to Melbourne a fair bit and when I take the jab I park it at Coldstream. Once again I've found everyone to be pretty friendly. I'm not sure if there is RA training there. I think it is GA through Royal Vic Aero Club... but talk to Bob when you get there. It's a nice place to fly from. (Only thing is I'm always thinking about my prop and the stones as there are no sealed areas on the taxiways if you have to hold). Always hear heaps of Jabs on the CTAF training out of Lilydale which, as Snooky said, is about 5 mins up the road.
Good luck for your new adventure... I'll keep an eye out for you next time I'm down there... if you see "55-1837" come over and say g'day... in the meantime look forward to hearing how it all pans out on the forum.
Regards