The process was very easy and straight forward.
The Canadian officers didn't ask me anything about how long I would stay in Canada and whether I quit my job in US.
They gave me forms and let me fill them out. They examined my passport and landing paper. Then they welcomed me to Canada.
I thanked them and drove to Toronto to enjoy the authentic Chinese food.
Remember, driving to Canada from Buffalo is one of the easiest ways to land or return to Canada. They won't put anything on your passport. No record on your passport.