"If the search and rescue volunteers weren't able to come get me, we would have had to stay there overnight and make our way out slowly the next day.
"It wouldn't have been the end of the world if nobody came out that night, but it definitely wouldn't have been pleasant so I'm very grateful."
Ms Robins was doing the tramp as an assessor for girls trying to get their Duke of Edinburgh gold award.
"There was another assessor on the tramp so we split the group up and the other half walked out.
"What happened definitely hasn't affected my opinion of Rotorua and I will be back to finish the tramp, that's for sure," she said.
The donation was a token of her gratitude.
"I know these people are volunteers who freely give up their time to help others and I know quite a few of them missed their dinners because of me so I just wanted to say thanks."