I'm aware that there's a native people in Scandinavia, and I know relations with them nowadays tend to be good. However I'm curious what those relations were like 200 years ago, 500, and even 1000 years ago.
I've answered this a few times, check out these two threads:
Did the Sami and the Vikings Fight
Relations between Vikings and Sami
Also, the periodization I am answering for (what you call the "Dark Ages") is more correctly called the "Germanic Iron Age" (c. 400-c.800) and the "Viking Age" (c. 800-1100). Maybe someone else can give you some more to go on for the later medieval, early modern, and modern periods.