"They were tailoring toward the 18- to 25-year-olds but it did look like party-goers were older.
"The event tended to police itself because the people were campers, it was a one o'clock bar close, and the crowd behaviour was good."
Mr Mossman said American hip-hoppers De La Soul had been a highlight on Sunday night and Kiwi drum & bass unit Shapeshifter had galvanised the crowd on New Year's Eve.
"Everything was cranking. It was so, so great. We're definitely coming back to Martinborough next year," he said.
Masterton performer Kaleb Vitale, aka K.One, also had performed at the festival earlier on Monday and said before the event he was keen to be part of the luminary line-up.
Mr Mossman said organisers had been aiming for 7000 punters and were thrilled to better the total by several hundred.
He said tickets would be capped for the next festival as well because the lower number had helped create a more successful and manageable event.
"We may have a thousand more tickets maybe but no more than that. What we got this year was a good number ... we're keen to keep it quite boutique."