I will be flying to Canada in a few days. I am an EU citizen so I do not need a visa. During my stay, I also plan to visit the US for a day. This will be done by crossing the border by car.
I understand that when crossing the border into the US, I will have to fill in the I-94W form. I found a copy of the form online. As I don't plan to stay in the US overnight, what am I supposed to write under items 13 and 14 (address whilst in the US)? I could state the city and state but no specific address. Should I leave it blank? Will it cause any problems at the border?
Additionally, when crossing back into Canada, which immigration formalities do I have to go through? Do I need to fill in another form, pass an interview, or will they just check my passport and I-94W and let me back in?
Additionally, when crossing the border, which documents should I bring with me? Obviously my passport, but should I also bring my flight booking showing that I will be leaving Canada (e.g. to show the US immigration officers that I do not intend to stay)? Anything else?