If there are recent decent rain, then most of the potential road kill will be away from the roads, feeding. This time of year, and rain will bring the green to the roadside verge, attracting the 'roos. By July, one would hope that there has been some substantial rains to keep the critters in their feeding. grounds. I would think this would apply to anywhere. My recent rides have used this strategy, on the 50CC in October 2014, didn't see one.
However, there is always a "traveller", moving from day camp, to feeding ground and vice versa, around dawn and dusk.