We have made a reservation in a guest suite in 
Rome.  Just found out that nobody is able to store our luggage until after 10:30 AM.. Our plane arrives in Rome at 6:40 AM.  The place is not too far from the train station.  We have a guided tour that starts at 10:30 for the colosseum.  Please let me know if that is possible.  If so, are the lockers big enough for a suitcase?
Mary