Done Alaska twice & gave truck & trailer some protection. You see all kinds of stuff people put on.
The 5er front cap got nothing & got nothing in damage save for a tiny chip that you really have to hunt for. The front of the trailer under the overhang got protection. Taped cardboard covered with bubble wrap to protect it from my own truck even though it does have long mudflaps in the back. Since all of our driving was by day I also taped bubble wrap over the headlights.
Then there are the bugs.......Oh yes, you will kill thousands of them. I did not worry about the trailer front cap but I did worry about bugs going through the grill & lodging for a slow cook in the radiator fins, hardly enhancing the cooling ability of it. The fix for that was sinple & cheap. Good old house nylon screen wire cut to fit the grill & zip tied to it.
The daily collection of bugs, & there were many, was brushed off at the end of each day with the snow brush. 6 years later that screen is still there keeping my radiator clean & efficient.