The picture is incorrect on the fueleconomy.gov site. The picture under my name on the left and the one below is the car. Those are my numbers on the site though. I saw nobody had entered any so why not? I indicate on the site that my driving style is fully to drive for fuel economy.
The car really is not big and can't haul much. I'm only about 5'6" and hit my head on the rear windshield in the back seat so its really a 2+2. However, the back seats do fold down and you can get some things to fit in there. Unfortunately, the whole back hatch doesn't open up, just the small trunk lid area. The rear deck is solid and stops you from being able to carry larger items. You might be able to fit a bike in there, but it would be very tight. I can check to see if mine fits in there for you if you'd like. Sleeping could probably be done in it, but I'm not sure how comfortable it would be. You could only get one person in it too.