I learned from the Bulgemobile crowd that, even if one can't handle the tire, having it handy means that someone else can! Same goes for other common repairs like fan, timing and accessory belts for whatever you may be driving.
I blew a tire near Silverton CO and tried to buy a replacement there -- They had to send off for one... Since I was staying for a while near there, it wasn't an imposition, but it would have been under other circumstances.
For those who don't know, the Road to McCarthy is reportedly the worst in Alaska -- It's forty miles long and was originally a rail bed -- The mines pulled up the rails and gave the rail bed to the state to make a road -- In some cases they just filled in over the ties without removing them and it resembles a corduroy road -- In many cases, they didn't remove the spikes, so jouncing over the ties may put a tire on a spike!
The road also has **four** tire repair places along it -- When I got to the parking lot by the footbridge into McCarthy (can't drive there except in winter when the river is frozen), there were several vehicles with flat tires
-- Again, driving slow on soft tires
was the right thing to do.