Same here, except for the prohibited smoking thing. I've never heard of a "no tobacco" rule at my location, but I see plenty of "Not a smoke/break area" signs-- way more than the "Smoking Area" signs. Funny thing about those signs, though.... I was told by the guy who hired me in my first couple of days to completely ignore the "Not a smoke/break area" sign and just stand right outside the door in my work area while I watched my rollers/the belt.
idk what you're going to be doing, OP, but just feel out the first day because no, you will not be getting patted down. At most, security can instruct you to open your bag (if bags are allowed) or to turn out your pockets if a metal detector goes off on you. Even then, as I understand it they're under a strict policy to look but not touch. If you don't comply, they're not permitted to force you (though I'm sure puffed up security guards have tried in the past at one UPS location or another)-- but they can always call someone who can mete out some kind of consequence, however minor and unlikely to stick those consequences may seem at the time.