The RS Venice book had a tip about skipping the line at San Marco. He says to check a bag at Ateneo San Basso and then you get an automatic cut to the front of a line. That sounds fantastic, but the book also says the bag check is for up to an hour.
I just can't imagine we would spend less than an hour in San Marco. Has anyone tried this? What is the deal? What happens to our bags if we leave them for more than an hour?