Im of the opinion that with longer settlement and further exploration the settlers would primarily locate themselves in New England due to richer prospects in agriculture, Newfoundland being a fortified stop over point and fishing port as would Nova Scotia ( stop off between Newfoundland and New England ) although both these land masses would be more easily attained and defendable with more manpower and could be cleared of natives ( or absorb the native population, more easily done than OTL Christian settlers ). And im intrigued by the possible relations with the Natives in New England, as farms would be less defendable, I believe the Native Americans and Nords could relate more to one another and share more in common than OTL European settlers 15th century onwards had.
With any luck I believe Vinland can be assured a couple centuries at most to take form relatively unhindered by other European powers, perhaps we could expect confederation with some tribes and its domince through it, the Nordic ruler being the 'great chief', or atleast firm alliance systems, and the spread of metalwork, and, interestingly, of horses. Coincidently, Nordic colonisation, may ensure a better chance for native survival in the face of European settlement and disease.