I will be flying TLL-CPH-ORD with an 8.5 hour layover in CPH - arriving at 7:05 AM and departing at 3:40 PM. Flying business on a United award ticket. My plan is to go into Copenhagen for a few hours and see some sights. I'll have a checked bag, will SAS hold onto it for that long layover, or will I have to claim it and recheck? Also, are there storage lockers in CPH (or at the main train station in the city) where I can securely store my carryon (that will have my laptop, etc)? What time should I aim to be back at the airport? I'd like to hit the lounge, flying premium is an extremely rare treat for me so I'd like to visit it for a bit.