Here is a worthwhile trip.
If you have some time and money to get to the wilds of Sweden I suggest you look into Vildmark. Vildmark is an outdoor excursion company based in Torsby, Sweden that puts clients at the helm of the trip. An incredibly hands-on 5-8 days, you build your own raft from what logs you can find, steer your own way slowly down the Klaralven River (Clear River), and make your own shelter along the banks.
At the end of the trip, you unlash the logs and set them adrift back into the river, taking back only the fish you caught and the smell of campfire in your clothes.