The burglars had left the empty soft drink bottles, along with other rubbish, strewn in the nearby car park.
Mr Douglas, who has run the business for three years, said he was sick of the constant graffiti on the boatshed and teenagers in cars doing donuts in the car park.
"It happens all the time in the weekend - someone is going to get killed one day."
"It's a big problem, especially with the graffiti and destruction of property. The council should put more security cameras in the park but they won't do it."
He had been in contact with Masterton District Council about getting more security cameras but said so far none had been installed in that part of the park.
He was also disappointed with the police presence in the area, he said.
"They can hear it and they won't send them over. I hardly see any patrols, especially on weekends and holidays."
Masterton Senior Sergeant Gordon Crawley said police had no plans to increase patrols in the park at this point in time.
Police were often not told about offending which happened in isolated areas like the park, which had few neighbours, Mr Crawley said.
"Often by the time we find out, they are long gone by the time we get there."
He was not aware of an increase in reports of graffiti in the park.
Masterton District Council did not respond to a request for comment before this issue went to print.