Right now I'm in the US and I'm thinking of taking the train from NYC to Montreal and then going through Toronto to Niagara Falls (Canada and US). My flight back to Canada is from HOU. The problem is that CBSA tends to hassle me everytime I come back to this country. I don't know why because I don't have a criminal record nor have I ever lied to customs. On my last entry back into Canada, the agent flipped through my passport and asked why I have travelled so much given that my passport is relatively new. I thought it was a very bizarre question to ask, but nonetheless, I answered it. After the agent was satisfied with my response, he let me through. This is pretty much why I'm considering abandoning plans to visit eastern Canada and just stay in the US until I'm scheduled to fly back to Canada. So having said that, should I reconsider? I really want to visit Montreal and Ottawa. I've been told the Amtrak train from NYC to Montreal is really nice and worth taking.

My concern with US Border agents is that they might get suspicious on why I'm re-entering the US after leaving for Montreal. Of course I'll explain to them that I want to visit Montreal and the Niagara Falls on the Canadian side. I will also mention that my flight back to Canada is from the US. However, I'm afraid that they might somehow reject my entry into the US.