During the Hamina Tattoo festival, accommodation is available in hotels, camping areas, among other places. There is also private accommodation near the town centre and a bit farther away. More information about the accommodation services in Hamina can be found here. In addition, there are many accommodation options near Hamina. You can see these on the website of Kotkan-Haminan seutu.
The accommodation capacity in Hamina will be filled quickly during the festival, so make sure to book your accommodation in time.