"Over the period of a day there were different shifts going up there from Hawke's Bay and Tairawhiti.
"So hopefully everything is fine."
Wairoa Mayor Craig Little said he has heard of no trouble overnight.
"Wairoa is still in one piece. I live out in the country, but I would be the first to hear if anything went down," he said.
"I have been really impressed with the gangs, as much as people think there is going to be heaps of friction, they have been very sensible."
Mr Little said he believes the strong police presence definitely helped keep the situation calm.
"Police are covering all their bases that's for sure, and I think they have got it all throughout Wairoa so that is great."
Mr Little was quick to note that what could happen between the Mongrel Mob and Black Power from here on in is "purely speculation".
Police reported a fourth man, also in the car, survived the crash, which occurred Saturday 7 when the men were on their way to a 50th anniversary celebration in Hastings.
Police investigations into the events that led to the crash are ongoing.