Those kangaroos in the first photo's are wild, Shay, they just come and go as they please. No ordinary fences will stop them. We had a couple just down at the back of our place yesterday when a friend came to inject his ram that he loaned to us.(Maybe an abcessed toe) Anyway, when he saw the 'roos he said "pity I haven't got my rifle", while of course I blessed the fact that he'd left it home.
When I go back down the the Gap again I'll have to ask at the Information area where I'd be most likely to see Koalas, you'd usually see some in the trees between the town and Lake Bellfield but don't know if that's the case now or not. The Currawongs, see link below, have tamed down to the point where they hang around waiting for handouts when people are eating.