Yikes.
Not sure where you are sending your child; if it’s somewhere like Temple or Johns Hopkins, I’d say ignore the carry laws. If it’s a more suburban/rural campus, I’d just say always know your surroundings, and tell them (her?) to try not to walk alone at night. Most campuses have services that will escort people home who feel uncomfortable walking at night.
One thing I’d add... Lots of kids around that age fear the police—or at least I did. Tell them that if they get into a sticky situation where they aren’t themselves going to get into serious trouble, don’t be afraid to call the campus police, especially if they’re going to a larger school where the campus police are an actual police department. I can’t tell you the number of times the campus police at my undergrad school helped me by giving me a ride when my car broke down, or picking me up when my friend was too drunk to drive and the cabs stopped running, or letting me into my dorm when I lost my keys, etc. The key is to be nice and act like you don’t expect it of them, then they’re putty :P
Also, I’d say even more important than “watch your drink” is “never be alone.” Girls usually get into the most trouble at parties when they’re separated from their friends. And a few stern talks on how to handle alcohol might not go amiss, because it’s bound to be an issue, no matter where she goes.
I used to do that for my dorm, escort girls home so they never walked alone. Ever.