You'll gonna love it. Met a guy here with his 2015 Tundra and that Borla system and it gives a good harmony. He mentioned about Volant which is another good exhaust kit but Borla suits his style.
Sounds great set up you are getting. Care to share some pics? Thought there's a slight difference on oem tire size compare to the KO2. Share here when it fit well or needs some work to make it fit. Enjoy the projects.
Those looks nice and sturdy tire mounts, sure they will do the job. I always thought that heat is not a huge issue in Alaska.
How long the trip will be? I will be little worry with extra weight. Some nice tire repair kit could help. Search with some good shops around there for good inspection.