not at a college campus, bike nicking meccas , as there are many to take, un-noticed.

German export Abus, locks , chain + folding link lock, for 1 bike,
NL import AXA defender, ring lock and plug in lock up chain on the other..

To Op, if you frequent the same rack daily, leave 1 lock on the rack, bring another with you.
perhaps make a tag for the left lock, and talk to campus security so the call you
to remove your lock at years end rather than be destroyed
when they do a left over property clean-up..