However many finds they make, in the end the combination of distance, the insufficiency of Iceland and Greenland as staging grounds, and the limited attractiveness of the North-Eastern parts of Canada to Scandanavians (the Normans for some reason tended to conquer areas that were warmer and more fertile than the places they came from) resulted in no enduring presence.
Several centuries of English rule probably entirely obliterated, and certainly effectively erased, the native population, and with it, much hope of finding living genetic or cultural residue.
Pls see 24.
My theory is that Europeans have been fishing the Grand Banks for a very long time. A good strategy for long range fishing expeditions might have been to stage the return voyage from New Foundland to repair the clinker hulls and dry/salt the catch prior to the long voyage home.