I did a swarm collection last spring in Thomastown. The source feral hive was in a cement power pole that as far as I know is still there. I just have to try and remember the name of the court that it's in...
edit: Ok, I've located it on google maps. Shilo Crt Thomastown. They do not have a street view of the actual crt, but you can see it from the Wirraway image at the start of the crt. The power pole is at the very end of the court in front of the 2 story house with the small tree in the front yard with the wire fence. I collected the swarm from that tree about 1 metre off the ground. Easiest one so far. Given the feral hive has swarmed before, might be a good bet. The entrance to the feral hive is about 3-4 metres off the ground up the pole from memory.
Don't know where you would put the trap though as the tree branches were very flimsy.