Carrington has won the last eight K1 200m national titles but elected to skip the single-boat racing this weekend, following a lengthy break after her double-medal heroics in Rio.
She quickly made an impact in team boats, however, joining fellow Whakatane paddler Jaimee Lovett to win the K2 200m, then combining with Lovett, Rachel Clarke and Anne Cairns to win the K4 200m.
It was also the perfect start to Lovett's three-day farewell, with the K4 Olympian announcing her retirement from the sport at the end of this regatta.
In the men's ranks, Mana's Kurtis Imrie also claimed his first individual open title, taking out the K1 200m by 0.44secs from his New Zealand squad teammate Taris Harker (Bay of Plenty).
Imrie flashed home in 40.97secs into a slight head-wind, with Harker clockig 41.41secs and William Wilkins (Hawke's Bay) third in 42.44.
Young North Shore pair Ashton Reiser and Karl McMurtrie caused an upset in the K2 200m, winning in 34.37secs, with Poverty Bay's Quaid Thompson and Zac Ferkins 0.70secs adrift in second. McMurtrie and Reiser also featured in the North Shore boat which finished second to Arawa's crew of Jake Koekemoer, Dylan Neal-Hill, Ben Duffy and Daniel McDowell in the K4 200.