Storlandet is an island about 2km away from Tvärminne coast. There is a ramp for small boats in tvärminne or a better one in Lappohja. On a calm day you could even go there by rowing but better be sure about the winds.
Geopark sector is facing east but the area gets sun quite early because of the wide open area in front of the sea. That said, some of the routes stay in shade almost all day. Its a compact area with good quality boulders. Most of the routes are not too high and can be climbed with 1(+1) pads.
Docking the boat should happen in front of the wall. Parking marker is placed so that atleast 6m ht boat with 50cm draft can be parked there with long rope on the rear anchor. North/east wind might bring some problems and in that case it could be possible to dock also on the other side of island where no houses are nearby. Land is owned by the state and its used by Finnish defence forces sometimes but there are no continuous restrictions about using the area for normal hiking/bouldering activities.