I finally went out and did more cycling today (this week's total has only been 70km, down from the usual 250-300km) and finished surveying Goonellabah.
So the region bounded by the Goonellabah ABS suburb boundary can now be considered "navigable road complete".
Richmond Hill Road also got another once-over so now there's only a couple of side streets in Richmond Hill which are unsurveyed. I wanted to get them all done but it's a hilly area and I was just getting too tired. It's amazing how much your athletic performance drops after a short break!
I'm a little lost as to what to map now. Perhaps it's time to stretch out and have a stab at Casino and/or Alstonville. They're just both so far away. Casino is a 60km round trip and Alstonville is 27km away (going via backroads).
We'll see what happens. Hopefully my cycling mileage will increase again, but it'll be harder without the motivation of mapping.