OK. Vik has the right idea. Think laterally. Is it really a choice between "carry this everywhere" and "lock it somewhere where it will get stolen" ?

There are no lockers, for bikes, or other large items to rent on your campus ? There are no places where bikes are under the surveillance of campus security, direct, or not direct ? Is there a campus cycling society/collective of some kind that will advise you ? Speak to campus security to see if bike stealing is a problem, or if there are particular places where locked bikes do/do not get stolen.

It is a tricky one. Otherwise, as I recommended to someone else, if it is a question of multimodal get two beaters. One to ride to the station from home and leave locked there, one for the station-campus-station journey at the other end. If either gets stolen, no big deal.