Trouble has been rare at the family-friendly festival but the combination of sun and wine has usually proved too much for a few patrons.
On Saturday, however, organisers only dealt with two such cases instead of the usual 10 or so. Festival-goers who over-indulge are given shade, food and water and have their wristbands removed so they can't buy any more drinks.
This year was also the first time organisers had tried to create a zero-waste event with compostable food containers, recycle bins and pig buckets for food scraps.
Instead of disposable cups, festival-goers had to rent a reusable cup for $1 which they returned at the end of the day.
Refilling patrons' cups, instead of pre-filling new disposable cups each time, required new systems and more staff at the bar, but only caused delays for the first half-hour.
''It's a lot more work but it's worth it,'' Whapshott said.
Co-organiser Steph Godsiff said 1750 tickets were sold this year. At 26 per cent Whangārei residents made up the biggest group of festival-goers, with the rest of Northland and Auckland both on 24 per cent. The remaining 26 per cent came from various parts of New Zealand.
Godsiff said organisers were considering how to mark the festival's 10th anniversary next year. She encouraged anyone with requests or ideas to share them on the 'it' Bay of Islands Festival Facebook page.