I've done this at 4/5 sites and all of the sites have been super understanding and accommodating. I only felt awkward when I left the interview area and made it almost entirely out of the building before I realized I left my suitcase and had to go back in and get it. Oops hahah edit: Time permitting, you might also see if your hotel can hold your luggage while you interview. Tomorrow I have enough time to swing by the hotel and pick up my bags rather than going straight to the airport. I'm definitely looking forward to not having to carry bags with me tomorrow!