*You can see how the 4RUNNER roof would be better than the fastback Aerolid for towing
*In another table (I don't have it available) a roof deflector to direct the air up and around the nose of the trailer is good for a 15% drag reduction.
*The Aerolid RV combines the larger tow vehicle wake of the 4RUNNER,plus goes beyond,with it's integral air deflector,increasing the F-150's wake,from 27 sq-ft (12-mpg),to 37-sq-ft (? mpg).
*NASA's roof deflector was good for a 15.7% drag reduction.
You should have some interesting numbers by Sunday.
Travel safe!