Coolstore managing director Allan Dawson said staff were "reeling" from the crash.
His wife Nell, who is operations manager, said: "They were part of our family. They were all fine young men."
Investigators worked late into the night to determine the cause of the accident. Hearses arrived before midnight to take the bodies away.
A dad and his son killed in last night's horror crash took up seasonal work to support a family of 15 in Tonga.
Former packhouse workmate Blair Robertson said as well as being the kindest men you could ever hope to meet, Sitiveni Vaipulu and his son Koli were extremelyfamily oriented.
"Koli was right into rugby. They loved rugby and they absolutely loved the All Blacks. Any chance they got they would watch rugby."
He said the pair were highly skilled workers able to turn their hand to any job on the floor. After just one season Koli had been promoted to a supervisor role.
Robertson said he and his fiancee Alex Harris had been looking forward to catching up with the father and son in coming weeks.
They had formed a firm friendship when they worked alongside them the previous season. His fiancee had helped Koli with his English and he and his father shared a special supportive bond in the packhouse environment.
"Koli became like a big brother to her and Steven like a father."
He said news of the death had been heartbreaking but the Vaipulus would be held in great affection by the couple and never be forgotten.
The crash also took a toll on a second extended family, who lost two brothers-in-law.
Samuela Taukatelata was married to the sister of Sione Teulaka, according to cousin Manoa Sisfa Tangi.
