Mr Dudley said the fire service was showing the kids the trucks, and the police and army were also joining in with activities.
The children also had the chance to go caving and check out glow worms, and play sports.
He said there were "lots of outdoor activities" involved.
"You see kids coming out of their bubble."
Kids could also do "a little bit of reflecting on things that they can kind of change in their home lives a bit."
He enjoyed seeing children who were shy in the trip over to Palmerston North come out of their shell.
"The van ride was what sold it to me . . . On the way back they're like best of mates."