A gooseneck does not take up too much room in the bed. My 5th wheel hitch does though... Can't load much in the bed though...
My 5th wheel pulls so nicely though; much better than a comparable weight bumper/pull behind. My 5th wheel is only about 7500lbs. I have towed 7000lbs on a bumper pull. The 5th wheel just tows sooooooo much nicer.
I heard that!