Bring it or buy it there?
If you already have a bike you like and it's in good shape, bringing it is usually worth it — you know it fits and you trust it. If you don't, buy after you arrive, not before: a local shop will size you properly and do the first tune-up, and a campus or town bike co-op (most college towns have one) is the cheap, friendly way to find a sound used bike and learn basic repairs. Skip the big-box "bike-shaped object" — it costs more in repairs and frustration than a decent used bike.
The theft reality — lock like it matters
Campuses are the one place bike theft is genuinely common: thousands of bikes, packed racks, predictable schedules. This is not where you cheap out. Get a hardened U-lock, always lock the frame and rear wheel to a fixed rack, account for quick-release wheels and your saddle, and register your serial number with campus security or a national registry. A good lock used well is the single biggest thing between you and a bad week.
A note for parents
The most useful send-off isn't the flashiest bike — it's the boring kit that keeps a student riding safely all year: a serious lock, lights that stay charged, fenders for the wet months, and a rack so they'll actually carry books and groceries. Run the Assessment together in Buffalo and it'll turn your student's real situation into a short, honest list — and flag the one item worth spending real money on.