Take the ferry to Rødby, Denmark (45 minutes). Follow directions till Køpenhamn and from there follow directions to Helsingør (E47, 205km). Take the ferry to Helsingborg, Sweden (20 minutes). Take the E4 in the direction of Stockholm. After 294km at Ödeshög take a turn for Motala and Örebro (road nr 50, after a while changing to E20, 117km). Right after Örebro follow directions to Ludvika and Fagersta (road nr 50). After 40 kilometers at Lindesberg follow directions to Fagersta (road nr 68). After 64km, shortly befor Fagersta, follow directions to Ludvika (road nr 66). After roughly 15km take a turn left following the signs to Tolvsbo and Malingsbo. After a little over 2 km the hotel is on you left-hand side.
There is also the opportunity to take the ferry from Kiel, Germany to Gothenburg, Sweden. We ourselves have no experience with this but have heard from a variety of guests that it is a very pleasant and relaxing trip!