I would recommend contacting my friend Tim Rued, who is a very accomplished Swedish fiddler. Although he is American, he speaks fluent
Swedish and has been awarded a bronze medal in the Swedish Traditional
Fiddle Championship. He often leads tours of Sweden, and specializes in music arts and culture. He knows many Swedish Fiddle (fiol) and nyckelharpa (key fiddle) players. You can also see the link for the Spelmanslag I posted in this thread. http://www.members.aol.com/timrued/index.htm
here is the web site about his guided travel opportunities
http://www.folksweden.com/