The smell would be the sulphur from the bore water. It does stink a bit!
If you happen to come through Wee Waa, you'll have to stop and grab a bite to eat at the bakery to say hi. I suspect that you'll be going through Moree and then out to the Ridge via Colly though.
One thing that has changed out there, the Olympic sized diving pool is now open after about 20 years of construction. Go have a look!