I won't be doing any serious planning for some time yet, but I will be there! I suggest being a little flexible in your plans so that you can make a decision about being inland or on the coast perhaps as late as the evening beforehand.
The computers and algorithms behind the weather models have three years to improve before then, and the cloud forecasts are already very useful, especially for short term prognosis.
http://skippysky.com.au/Australia/