You can ask this question to 10 different people and get 10 different answers. The simple answer is what's right in front of you. If you have a 1 year working holiday visa planned for Australia...use it ALL! You will only get the chance once and once it’s gone...it’s gone! You can easily cover your bucket list spots in 3-6 months leaving you 6-9 months left for working.
If you plan to do your 2nd year visa we would suggest getting the travel out the way nice and early from Melbourne or Sydney upto Cairns. That way you can do your ‘Farm Work’ up in the sunny state of Queensland!