bareftn you are SO right. Just returned to the lower48 from 8 weeks in Canada and Alaska. Two rigs travelled with us had toads, to say you can travel the Alaska Highway with no damage is a "very bad joke". With grill guards, that tow apron device and hood/windshield covers they both lost a lot of paint to rocks. Chips occur around wheel housings, door handles, mirrors and mounts. Grit accumulates in window channels, trim, wheels, brakes, undercarriage, running boards spare tires/mounts. When it rains or they water down the dust, everything is coated until it is like 40 grit sandpaper, hard, crusted, ground up rock dust.
Those brush-like guards are as bad as nothing at all, follow a RV with one and watch it fly in the breeze.
My dually has rigid mud flaps/rock guards on all corners and I have a heavy duty solid rubber guard on the bumper. The paint on my electric stabilizers is all but gone from flying debris, the frame behind the trailer tongue is badly chipped and the coroplast that lines the undercarriage of the trailer has taken a beating also.
I averaged between 15 and 35 miles per hour for most of the 1422 mile on the Alaska Highway, so I was not recklessly speeding along mistreating my equipment.
If you tow it WILL get some damage.
2001 Ford F-350 Super Duty CC Dually, 7.3 Diesel
2011 Cedar Creek 36CKTS Touring Edition
Full body paint, Cummins Onan 5500LP, Andersen Ultimate Hitch
We were on the road to ALASKA May 6, home Sept. 13, 2016. 23 states, 3 Canadian Provinces, up to the Arctic Circle, 17,300 miles, 131 days on the road. 1 flat tire, 4 oil changes. What a beautiful trip!