That is one of the benefits of regional commercial radio. Due to the fewer number of stations available compared to the metropolitan markets, the chances of sticking to just 1 or 2 stations is far greater in regional markets. For example, when in the Shoalhaven & Southern Highlands regions, I tend to stick to 2ST whilst there, which plays mainly classic hits, many of which is not played on WS or Smooth. Sister station 94.9 Power FM, plays mainly today’s music (Top 40), but does also play plenty of 90s/00s. Across the 2 stations, both 2ST & Power has got everyone covered in their market.
One of the negatives about regional commercial radio, apart from not having any real competition in many markets (that can arguably be a good thing in some cases, particularly in non-BOG markets), is that the adult-targeted music stations tend to take NRL/AFL on weekend afternoons during the footy season, as well as networked talkback from 2GB/3AW on various times, particularly on weeknights. Therefore, you would be stuck with just having a Top 40 station as the only commercial station in a regional market to be playing music during those times.
IMO, some of the best regional commerical music stations are mainly on the AM band, particularly the “Forever Classic” group of stations, which consists of 2CA, 2GN, 2XL, 3GG & 6iX (yes, I know that one is in a metro market). They are probably among one of the best classic hits stations in all of Australia, plus they all stream online too (most of which have been switched back on just last week) if you want to check them out. 