The indication to reach us you can find them here: Location : *FreeAir ADVENTURE*
you could also spent a night in the capital and the next day take a bus from Stockholm but it takes more then 8h to arrive and the same to go back + you will spent another day in stockholm the day before your flight. ... so, as it says in the web page, here in Sweden rental car are really low price (28-40€/day) and it does not worth it to consider other option. you arrive in the airport, take a car, drive up in a wonderful road trip of about 5h in american style. cheaper and faster.