Crossing the Border

I live about an hour away from the Canadian Border. Two friends recently came to visit me and had never been to Canada, so we took a day trip up. I warned them in advance that they'd need their passports.
Even though I've driven across the border 3 other times, I still get a little anxious when I drive up to the stop signs and little booths. Which makes for an awkward encounter with the Border Patrol person on duty... because I am really not a suspicious person. I try to be extra friendly and enthusiastic about my trip.
But I always forget the right response to "What is the purpose of your visit?" Tourism. Entertainment. Fun. Do those sound right? I list several of these, and mumble a few more until they ask how long I will be in the country. On the most recent trip, I said, "Just today." That was easy. What a relief. Then they hit me with the hard one! "Where are you from?" Now, my passport and license say one state. I went to school in another state, and I constantly forget I am no longer there, and I recently moved to a third state. So each of these is on the tip of my tongue, until I remember that it would be good to state the same thing that's on the document they are looking at. Then I remember that I'm not alone in the car, and my two passengers are from yet another state, so I have to specify who is from where. And like that, it's over!
I obviously built it up to be a bigger deal than it was. But I forget this as soon as I try to go from miles per hour to kilometers per hour, and when I return to the border going back into the US. The same thing happens. Except that this time there's new questions to throw me off, like, "What do you have in the car that you didn't have when you went into Canada?" The answer is, "Nothing," but it would be nice if they could phrase it differently. Maybe, "Do you have anything..." Because saying, "What do you have" makes me think they know something I don't know about the contents of my car. Anyway, then it's smooth sailing back on the roads of the good ol' US of A, and I can finally relax.