You will do fine. Just be totally honest, even if you are not sure about anything. It is true about cigs, alcohol and guns, weapons of any type.
You should be fine with general groceries. With you crossing at Niagra, a great market garden area, you should take advantage of our fresh produce that is in full swing right now. I would buy your meat and fresh veggies here.
I hope you enjoy your holidays in our country.
Remember...it is illegal to use any hand held device while driving, texting and phone. $500 fine. Seatbelts are a must. Also, if you have ever been arrested you may be denied entry.
Just be honest and you will be fine.
