That looks like a good almost perfect territorium for a Swedish colony.
There will be plenty of room, that's for sure. People often forget just how big Maine is, you can put the rest of New England inside Maine and still have room left over.
A Scandinavian relative of mine used to visit a town called, you guessed it,
New Sweden way up north in Maine's Aroostook Country. The village put on Midsummer festivals and stuff like that. Here's a
link for you.
Anyway, Maine was so big and so empty that up through the end of the colonial period Britain administered everything east and north of the Penobscot River as part of Nova Scotia while the rest administered by Massachusetts. The border between Maine and British Canada wasn't even settled until 1842
22 years after Maine became a state!
The Penobscot might not be as long as the Hudson or offer a route towards the Great Lakes, but it will still give the colony access to what was and pretty much still is an awfully big and awfully empty chunk of North America.
Hope all this helps you somehow.