Replying to all the above since my last post-
I'm looking at 3 nights, leaving Monday.
The info I have was ambiguous, but I agree with Marcus's info, that you only lose your deposit 8 days or more before. One week before and they charge you the whole whack (which is a bit savage- but that's their prerogative).
There's also an implied waiver if the late cancellation is unavoidable- for instance an accident or sudden sickness.
So we can add Mrs Biggles to my listing and we'll be in a single bedroom cabin from Friday to Monday. I doubt Mudgee is as fascinating as Mannum where I happily spent all day Sunday touristing.