For the GRN there'd only be 3 or 4 sites between Newy and Buledelah. From there it's PMR to the border, FRNSW, ASNSW, RFS, SES and of course the police.
You will need a digital scanner to do the whole area, even outside the GRN as the police are steadily going digital and the RFS have gone in certain areas too.
Cheers
Matt