Mr Mears and St John Ambulance acting Northern District operations manager Ben Lockie commended the organisers of the event for their first aid planning efforts, which included hiring private firm EMT Medical to co-ordinate first aid on the ground at the event.
"We've been liaising with them for over a month and they are very well organised," Mr Lockie said.
The event has a strict no drugs and controlled alcohol policy, with a bag search at the front entrance.
Northern Bass production manager Etienne Marais said about 5500 to 6000 people attended on the Tuesday of the two-night event, and only a small handful of those "overdid it".
"Otherwise the vibe in the crowd, the mood and the temperament were excellent."
St John staff had visited the Settlement Rd site prior to the event to look at potential helicopter landing sites just in case.
The event's alcohol management plan included measures such as a number of food stalls and assessing the intoxication levels of punters and changing the number of drinks served to each person.