It's ideal for MEPT and other air forces use similar sized aircraft for this role.
We do use fixed wing aircraft for firefighting if required. Local
topdressing aircraft can be utilised with their hoppers filled with fire retardant instead of fertiliser. They are single engined turboprop aircraft, that use rough farm strips so don't need large regional airports to operate from.
An argument alluded to by Xthenaki is why should the RNZAF operate what would strictly be a civil operation more attuned to Fire & Emergency NZ under who's purview the fighting of bush fires belongs? He does have a point and maybe the NZG should form and fully fund a civilian air service that encompasses fire fighting, SAR and air ambulance, both fixed and rotary wing. But they won't because like Canada, the NZG has had a strong Scottish heritage so is loath to spend money. It's against its religion.