Grafton to Casino is quite good with very little traffic. Grafton to Coffs through Coramba is good bike road too. Once at Coffs, could go up hill to Dorrigo, Ebor, Armidale, Uralla to Walcha and down to Wauchope, back roads to Taree and up Buckets way to Nowendoc, Walcha, Armidale, Guyra, Ebor, Grafton, Glen Innes, Tenterfield, Casino, Kyogle, Rathdowny, Beaudessert. Also consider some of the more western roads like Stanthorpe to Texas, Yetman, Warialda, Bingara, Inverell via Copeton Dam road
,Glen Innes.
Have ridden most of these roads in last six months and have varied from excellent to average, most with very little traffic (but keep an eye out for the wild life).