"The main problem is people drinking there at night. One, we have a lot of nocturnal animals there and you may not realise you've parked yourself right in front of a burrow.
"You're actually stopping that bird from being able to get out to feed their babies. Even two hours could mean life or death for a young bird," she said.
"Two, once they've had a few drinks they're more likely to leave their bottles around and they'll go off trashing the island, swinging off trees and breaking branches."
"The damage that gets done is just horrific.
"It's not good. I cried, I cried like a baby. It breaks my heart."
Summer was a particularly problematic time, she said.
"The rubbish that gets left behind is just terrible. This time of the year the [human] population increases so you're going to get a lot more rubbish."
The trust would be increasing nightly patrols of the area for the summer period, she said.
"We don't want to be like this but we feel like it's the only way to get our point through."
She was thinking of the future, hoping in years to come she would take her grandchildren to Moturiki Island and the little blue penguins would still be there.
"Go, enjoy it, it's a beautiful place ... It's special and unique. We should love and cherish it."