You can take a rowing boat or church boat to Linnansaari and hike to Linnanvuori, the mountain with a view of the Haukivesi islands in Linnansaari National Park.
We did the tour in mid-June 2023 when it takes place at sunset time. The seals are then very shy, they lie individually on rocks and from a distance lay …
The footpath that leaves to the right when looking at the campsite from the pontoon leads to Iso-Pyyly lake; allegedly there is even a sauna on the lake (but we didn't actually go there).
Lovely nature trail through varied terrain (quite a bit up and down and some uneven paths, sometimes fairly steep) through very different types of forest. And of course blueberries, mushrooms - and mosquitoes!