Travel damage by stones is caused 2 ways. On comming traffic throws a stone in the air and you hit it. If you're doing 60 you know what's going to happen. Solution: Slow down.
Second way is stones being thrown up by your rig, and they then hit a piece of your rig (fender flare, side panel, toad, etc.) at speed. Same result as above. Solution: Slow down.
Are you beginning to see a pattern here? Yeah, slow down.
If the full width rock guard is installed as directed, it works quite well. Lower to the road IS NOT BETTER, it throws up more rocks. Follow directions.
We've driven up to Alaska 4 times in the last 6 years and manage to run about 100 or more miles on dirt/gravel each trip. Before I learned to slow down, I picked up 2 pocs in the Bus windshield, but none recently. By the way, Tok has a few guys that come to the RV parks and repair rock chips. Use them to keep a chip from graduating to a crack.
Enjoy the trip. It's a great place.
2013 Tiffin Allegro Bus 43QGP
2011 Chevy Silverado 1500 Toad