"Keen to find a fantastic day walk with a finish at a good pub or accommodation ..."
Technically, here in Australia, no Bushwalk is ever finished until you have reached the Pub.
Seriously, though, I would just plan a bushwalk with the distance and amenities you're seeking (swimming, views, etc), then figure out where the nearest Pub or Hotel is.
Some quick ideas - Spit bridge to Manly, Royal National Park coastal track finishing Bundeena/Cronulla, any of the walks around Katoomba finishing there or Blackheath or Wentworth Falls, Great North Walk ending Hunters Hill, Hornsby, Brooklyn or Patonga etc.
Wildwalks.com for ideas and track descriptions.
Skibug.