Evje is a inland town in South Norway. It's a very small roadstrip town with not much interest in itself, especially when it packs up with tourists in the summer. But it's a good place to stop to get equipment and supplies, and north of town there's whitewater rafting. Further up Setesdal you can find beautiful areas both down in the valley and up in the hills.
From the bus terminal in Kristiansand there are several buses each day operated by Setesdal Bilruter , and a few by Nor-Way . A handful daily routes continue on to Haukeli, with connections to Bergen.
Bicycle is also a popular alternative, but the main north/south road can be a bit trafficked.
Not too much to choose from.