I'm going on a two week hiking trip around Tromsø in Norway and I like to have a fresh set of clothes for the flight back so I don't bother anybody (including myself) with my body odor on the airplane.
Because I have to carry literally everything I use on my back for two weeks I would prefer to store my airplane clothes somewhere in Tromsø.
The airport does offer baggage storage for 60NOK (≈6€/6.7$) per day, which projected for the 14 days is quite a sum.
In Germany there are storage lockers at train stations for about 2€/72hours so I wanted to ask if there is anything similar in Norway/Tromsø.
The size of the stored clothes would be a small plastic bag and no suitcase.