Kiama took out the second division premiership, as Campbelltown completed their dominance of the Illawarra junior rugby grades.
The Harlequins claimed three of the five trophies, beating Kiama 43-20 in the under 13s and 65-0 in the under 11s, as well as recording a 38-nil victory against Tech-Waratahs in the under 10s.
Their only defeat came in the under 12, where they were edged out by grand final hosts Camden 31-28.
However, showing off the quality young players they have coming through their ranks, Kiama claimed the under 15 trophy with a 36-20 win over Tech-Waratahs on Sunday.
Angus Blackmore scored two tries in the win, while Cooper Lee also crossed and Tyson Sloane finished with a five-pointer and two conversions.
In the under 13s game, Callum Roberts, Micah Gibson, Flynn Allen and Balunn Simon all scored tries in the loss to Campbelltown.
Clarke Cooper scored four tries for Campbelltown in the under 11 win.