Good to know that the roads have improved since I was there last. Actually paved roads could be worse than gravel roads due to the type of paving ie chip seal and speed not that I said anything about gravel roads.
The suggestions I made were mainly concerning rock damage to a toad and are applicable to any road.
BTW The entire 1,300+ miles of the Alaskan Highway are paved and a number of us did have rock damage in 2013. The OP is concerned about a new rig and it’s good to be prepared. But sorry if I hit a nerve with anyone.