"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.