Questions about CAQ

<p>Forgive me for being paranoid, but could someone confirm for me that, as a US citizen, all I need to do to get a Study Permit is show up at any border-station with my CAQ, letter of admission, et cetera? (I have this fear that I’ll be trying to cross out of the Upper Peninsula, and the customs official will be, like, “Sorry, but we only do that in Windsor…”)</p>