And I would add if you love Caesar salad, a proper one, have all you can eat before you leave, they don't exist in CABA.Bring any electronics that you might need until your next visit to the US..... computers, phones, Chromecast, tablet.
Any new devices should be made to look like they've been in use ie: take them out of their box, setup user info. I've never heard of anyone being checked but there's always a first time.
$USD should be used 100's.
Tylenol is not available here.
Also before you leave... have bagels and lox and corned beef on rye. send me photos.