Yeah, I think there was far more traveling going on but not a lot of written history being kept. Written history and record keeping was mostly a southern European thing.
Great point.
At that time, the only ones who knew how to read and write were monks, nuns, and priests. Very few people outside of the church were literate...even the royalty.
So, more than likely these Viking explorers and settlers had no education, and did not record their travels as they went along....We just have the ancient Norse Sagas that were written from oral histories