We know how to change a damn tire. We just couldn’t easily buy one because Gatlinburg didn’t have any garages open on Sunday morning.
I would describe that as "inconvenient" but actually very fortunate!
Walmart was only 15 miles away? You have a donut/spare, or AAA has provided you with one? That's lucky! Nowhere near "problem" territory at all.
Just an interruption to your schedule, but that happens on road trips.
(Fyi, if anyone reading this does ever use that sealant stuff, when you get to a proper repair shop TELL THEM about the sealant before I pop the bead and spray it all over the shop.)
Turns an "omg" problem into "eh, hold my beer..." for 99% of tire punctures.