On my LWB Wagon I have found that a 9 ft "knotted end" hammock with the ends closed in the front passenger door and driver side rear door works perfectly. I can even leave the driver's side 3rd row seat up with no interference. Much more comfortable than any roll up or blow up mat I've slept on, plus it takes up a lot less room. I keep my hammock rolled up and stowed in the passenger side overhead for lunch hour naps and impromptu camping trips.