Police patrols were set up to ensure the crowd's procession from the funeral, held at a suburban address, to the cemetery went without a hitch.
Mourners with tattooed faces made traditional Mongrel Mob barking sounds as they accompanied Mr Stone's body to burial.
Screaming "seig heil," they made the mongrel mob gang hand sign to each other as well as onlookers.
The sea of red was spliced with hi-vis vests as Maori wardens were also enlisted for the huge crowds expected.
Police preparations for the day included dialogue with gang members as well as Wairoa Mayor Craig Little.
Local police refused to comment when asked on Saturday about the day's events, but Mr Little said the day had been "all good, no worries at all".
"At this stage I can't fault anything that's happening in the place."
Mr Little said he would probably visit the local gang leaders soon.
He also said he recalled not long ago meeting with Mr Rigby for a catch up.
After Mr Stone's burial the bulk of mourners convoyed across the Wairoa bridge to join fellow mob members at Mr Rigby's funeral.
Set back from the road at Takitimu Marae, hundreds spilled down the driveway.
Sun beamed down on bonnets of cars that lined the grass verge. The huge influx of people to the small town had booked out a local hotel and the pies at popular cafe, Oslers, had sold at a rapid rate.
One Osler's cashier said despite the increased numbers of people in Wairoa that morning Mongrel Mob members had kept to themselves.
Many people's Saturday mornings continued as normal; families picnicked under the clear skies near the riverside, they perused the local Dollar Heaven shop and many strolled along the Marine Parade.
Bridge Motor Lodge owner Peter Nash said the gang presence in Wairoa was not an issue.
"If you respect someone, then they will respect you," he said.
But one Wairoa resident said the increased police presence was comforting.
Police investigations into the events that led to the crash were ongoing .
The three men were killed when the car they were in left state highway 2 and plunged down a steep bank into the Mohaka river near the viaduct.
A fourth man, also in the car, survived the crash.
The men were on their way to a 50th anniversary celebration in Hastings.
