I love Canada and the United States, so I'm excited to cross either way! But I will say, Canadians are a lot nicer. I have dual citizenship, but my mom doesn't (only Canadian citizenship) and the Americans always give her a hard time when traveling back to the U.S. That's 'Muerica for ya!
The last time I visited was beginning of January in the evening time traveling from New York to Canada and it was easy peasy. Have all of your documents ready, be honest in your answers, remain respectful, and enjoy your stay in Canada or America! Let's see how it will be coming from Canada to America. I shall update then! :)