Keep Documents Handy!
Keep your documents handy is good advice! It is a good idea to keep a copy of your drivers licence and passports at your hotel just in case your original passports are stolen or misplaced. You must carry your original passport at all times. You can also email them to yourself; keeping them on your smart phone, or of course – take a photo of them.
The police (Carabinieri) at times do random checks against your travel documents. It might be difficult to communicate that you have left them in your hotel room. Save yourself the possibility of a tense moment.