Plausibility check, please (Vinland)

So basically the gist is that the Norse reached southern Nova Scotia?

That's not a very wild claim, definitely within the realm of possibility. One of the writers in my Smithsonian book on the North Atlantic Norse makes similar claims, but he pointed to New Brunswick as the probable location of the Norse interaction with Native Americans. If claims like this are true, then the encampment in Newfoundland was indeed a base camp from which further exploring was done, which would explain the presence of nuts at the archaeological site that are normally found much further south.

I wouldn't take your website's word at gospel truth though. I don't know enough Eastern Canadian geology/geography to determine exactly how accurate its claims about where the Vikings explored are. Like I said it's within the realm of possibility and an interesting inspiration to explore when writing about Vinland.
 
Yes it's certainly plausible and not a very outlandish claim. I highly doubt though that we're ever going to find any evidence to support it though beyond idle speculation. And to be honest any evidence that that did arise would be suspect since it's far far more likely that someone manufactured it than some artifacts surviving.
 
It is perfectly plausible and if the colony had survived it probably would have spread along the coast and on the islands in the Gulf of Maine.
 
Top