LOL?
If a school can't be accommodating enough to take care of a suitcase for you, then what does that say about the school? Med school interviews are scheduled during the week when you have other commitments, such as exams, other interviews, etc. Sometimes you may have to take a 5 am flight and get there right at 8 am with no time to find suitcase storage. Other times you may need to leave immediately after the interview without time to pick up your suitcase form somewhere else.
The med school interview is not just about them judging you. This may be your only chance to see the school before you make a decision, so you are responsible for judging them as well to see if you would like to go there. Granted, this is secondary if you aren't accepted anywhere yet, but it's important. Back when I apllied, i didn't have the opportunity to go 2nd look at any of the schools, and my decision was based purely on my interview experience.
If a school can't take care of your suitcase, what does that say of the program.
Furthermore, I already go to med school, so I have no need to apply this cycle.