Danny, by the time you made your first driving trip to Alaska, I had already made 4 round trips, starting in 1962. I have had two flats, one I noticed as I pulled into the gas station in Watson Lake and they patched it for me. The other I did on a sharp rock on the Top of the World highway. In the 52 years I have been driving the highway, I have only broken my rig once. In 1969, I was pulling a popup tent trailer behind my Bronco and managed to break a spring shackle off, by hitting a pot hole, while driving too fast.
In the 13 RV round trips to/from Alaska I have never had the tire problems mentioned, plus I have made other car/truck trips, as well as several trips flying small aircraft, following the Alaska Hwy.