Measure for Measure role-director Matt Brebner said fundraising efforts have been boosted by random acts of generosity from students and members of the public.
"We had one guy just walk off the street the other day and write a cheque for $200. Kids who I don't even teach have been coming up to me and giving me their lunch money to put towards the trip," he said.
Mr Brebner said the positive competition result was welcomed by the school following the recent Havelock North water crisis.
"The school's had a pretty rough time because of the water crisis. We were closed for two days and the three days before and after we were closed I was only teaching a small portion of my class because kids were too scared to come to school, or they were sick.
"We lost a whole week of school just before the production competition."
Three's a Company will be one of eight teams from throughout New Zealand competing at the National TheatreFest on the 9th and 10th of September.
The final dress rehearsal before the competition will be performed at Duart House at 10.45am next Friday.
Anyone wishing to contribute to the Havelock North High School drama group's travel expenses can make a donation to their Give A Little fundraising website: https://givealittle.co.nz/cause/hnhsthreesacompany.