Little trailer for our cars means around 600 lbs loaded. Many on this list are towing and so far have not heard of problems.Plenty of your favorite music or books. I read where we shouldn't use roof racks or even tow anything. Some people put a spare in a denim laundry bag and put it behind the seat for just in case. Take a flashlight, phone charger, tire pressure gauge and gps. Basically, enjoy your ride. It will do well.
Smart roof's have been a problem area of our cars. Both crazing and some have even come unglued from the car. Forget the roof rack.