My 2015 36' 5th wheel came with 'Towmax' tires which don't have the best reputation. I decided to replace them this past summer before leaving for Alaska. I chose the Sailun 637's. I kept the original tires and sold them this fall after returning from Alaska. That way I was able to travel with the regular spare plus an unmounted spare Towmax. That ensured I wouldn't have to replace a tire in a remote place at a premium price.
I also used a tpms system for the 5er tires.
I was also nearing time to replace tires on my truck so I also carried one of the 'old' tires unmounted in addition to the spare.
Bottom line, my precautions ensured that I had NO tire issues on the trip! :)
We found the roads not much worse than the lower 48. A few more rough & longer construction zones and a few frost heave zones but not bad. The key is SLOW DOWN and relax.
