The weather up there is glorious at the moment. Daily range is about 15-30, it's dry and clear with a steady wind 15-30km/h from the ESE. I feel like hopping on a plane.
http://www.weather.com.au/wa/kununurra
Take a good broad-brimmed hat. If you are at all sun-sensitive wear long-sleeved cotton shirts (synthetics feel just awful up there and stink too). I'd consider having two set of clothes in use at any time - day and night. If you rinse the sweat out of the day set each night they will be dry in the morning. Eventually they will need a proper wash but it will put off smelling rotten for a few days. The alternative is to not wash so you get more space around you for the landscape shots
.