By mid June '16 after much research we ended up purchasing the Blue Ox KarGard II Deflector.
We used it on our 6000+ miles trip in Mid June through mid August '16.We feel that it served us "very well". It did allow dirt and dust (serious dirty mist during rain) onto the TOAD, but that is to be expected. However, no rock chips on the front of the TOAD (that's important).