Australia's climate and farming styles are quite diverse, so you may need to say what sort of climate and type of farming they may feel comfortable with. However, here is one for starters. I don't know what it is like, as it was the name that intrigued me. You can get further information by writing to the owners:
http://www.bedandbreakfast.com/photo..._farmstay.html it is situated in Queensland State. Give us some more info so we can assist you more.
Here is another one that has quilting supplies and encourages quilt groups to have retreats there. It's in QLD too.
http://australia.shopsafe.com.au/que...ommodation.htm