I am thinking of transporting a bed I have purchased in my X5. It is a king size mattress and two box springs. Bed is about 400 miles away. Anyone ever strap a king size mattress to the top and put box springs in the back?

Just a question guys. If you have great! Don't bust me up too much. U Haul charges miles. Shipping it is astronomical! And no I don't have the hitch (I wish) someone stole it!