Alaskans don't go thru a couple dozen tires per year. Yes, have a full size spare tire but you don't need multiples.
Lots of paranoia on this subject. If you don't feel the need for multiple spare tires in the lower 48, you don't need them for Alaska.
I always carry two mounted spares for the 5er. Hard to find the right tire on a Sunday morning in a small town. On a long journey, I carry a second mounted spare for the truck. My 5er is still just barely 15% of its weight on the pin. That way, I can wait and buy tires at my convenience. Tools, antifreeze, window wash, tires, oil and filter, grease, bearings, yada, yada, and I am still light on the pin. I love an extra spare, yep I have seen two popped at the same time. I think a wedge is the best way to jack one up.
