For those of you towing an enclosed cargo trailer do any of you use a wind deflector (guess that is what it is called) that is a "wing" to direct the air over the trailer to help with the wind resistance. I'll be towing with a 2007 Rav 4 and it pulls just fine with this 6 X 12 behind it, but I was wondering if the wind deflector was worthwhile. Thanks
Dan
PS "Wing" mounted on the car roof.