Police also recovered the couple's belongings, as well as items stolen from six other tourists.
"If something like this happens in Italy the police they don't care, it happens every day," said Miss Mancini.
"I believed I had lost everything forever - including photos from the last 10 years. My boyfriend bought another computer."
The couple had left Rotorua on their way around the country. They reported the theft at Taupo police station and thought that would be the end of it.
"Then we got a phone call to say police were working on our case and to please come back to Rotorua. They had some news. We came back and found our items. It was like a miracle for us. New Zealand police is the best."
Miss Mancini said it was hard for visitors like her as they lived in their vans, so all their belongings were in the vehicle, which made them easy targets. But she said the experience had made her more wary about where they chose to park.
Rotorua Police Sergeant Lee Stringer, of the tactical crime unit, said police had recovered "a large amount of property" which they had been able to return to tourists.
"It is always warming to receive the feedback we have from these people who had essentially given up the hope of any of their cherished memories being returned.
"The Mancini couple visiting from Italy were one such example and we are really pleased that we can both hold people to account for their actions and be in a position to return a large portion of their belongings back to them."
He said there were a number of ways tourists and the Rotorua community could help combat this type of crime.
These included being vigilant, taking note of suspicious vehicles and people, and not to leave items of value in their vehicle.
"Do not be tempted to purchase electrical items cheaply and report these people anonymously if need be to the Crimestoppers line 0800 555 111," Mr Stringer said.
