Ize said other missing items included three boxes of pork buns, all the soft drinks, and some foil.
There was also damage to the bumper, and the number plate had been smashed off.
Ize had been unable to get a full idea yesterday of how much was stolen or damaged, as he could not touch anything inside the caravan before it was tested for fingerprints.
"I have to go and clean it up," he said.
The power generator alone would cost about $700 to replace, but at a rough estimate Ize expected the damage and thefts would add up to about $2500.
Waitemata Police "are following very positive lines of inquiry to identify the alleged offender", Senior Sergeant Matt Laurenson said on Tuesday.