Margaret River area is generally a little bit cooler than Perth but can be lovely and sunny. I would definitely take some warm clothes as it may be chilly at night and in the morning especially for Queenslanders. But who cares its the food wine and company thats important and you will all have a great time. That Beer ass chicken sounds wonderful
Cardy, shoes, socks Gretchen - what have you got for the legs? 3/4 pants won't be warm enough.
You need a track suit at the very least Gretchen - give me your size and I'll find you one. If you don't, I will just buy you one and hope it fits