knowing how the parking works at our school i would say be careful. 3 issues.
1) its ok, but when you pick it up the next day you may have a ticket if the work day has started and you are parked without a permit
2) if you leave it in a gated lot you may not be able to get out since you wont have a valid permit, not sure how many SU has of those
3) if you leave it in a lot that is not designated for over night parking during winter weather events, you may be towed if they have to plow