IMAC budy built a " coffin top" out of plywood to protect the plane in transit with an open pick up bed, some big piano hinges to open close in front and duz/ jeep hood type fasteners for the clam shell top, really slick and barely over 100.00. Removed with 6 large screws when not in use. Whole thing made from off shelf Home Depot items,  Ill try to get a pic of it somehow. He carried it in open bed till driving on newly paved highway during construction,  imagine 12 miles of buckshot,  were dents  , torn,  monokote , cracked canopy.
He has a shell now. 
Minimum.. wrap with blankets or bubble wrap before serious travel.