St Pierre and Miquelon is not a US border crossing. It does not involve the US in any way. St Pierre and Miquelon is French island (i.e. owned by France) which you can reach from Canada via a ferry only from Fortune NL.I don't think he is, I think scylla is. The question wasn't addressed to her so what is she telling stories about her vacation for? Nobody is answering his question and I'm interested too. I don't have a US visa and I don't want to get a decline from US oficer. Also I don't know what would happen if I got a decline from US and than some problem with a new work permit occured? Do I have to physically leave the canadian soil or not necessarily? Is there a crossing where I could only talk to Canadians, but not to Americans? Anyway St Pierre and Miquelon seems to be a good option so if anyone knows how it works there please share.
You won't interact with US officers if your aim is to use the St Pierre and Miquelon crossing. You would be interacting with French officers. You must show you have authorization to visit France to get on the ferry and leave Canada. So if wanting to get a work permit activated through this border, you would need to get a French visa (if your passport requires you one to travel there),
And yes, you need to leave Canadian soil to flagpole. You must leave Canadian soil and then you re-enter to activate a work permit / study permit / etc. If you go via St Pierre and Miquelon as it sounds like you're planning as well, you'd be doing this by ferry.