<p>You move your things in before fall quarter starts, and then you move them out after the school year is over, aka when spring quarter ends / summer begins. You personally have to leave the premises during Winter and Spring break, because first-year dorms close during Winter and Spring breaks so obviously your person should not be there, but you can leave your things there and no one will enter your room or tamper with anything during that time. After break you go back to your room and continue living there. </p>
<p>short answer: person - leaves, things - stay, until summer starts and your contract expires.</p>