Every decision has to be driven by the situation. I suspect that if there were a bike shop at hand with the right tire available, there wouldn't have been the OP in the first place. In any case, blowouts aren't convenient, but not especially dangerous. They're a common enough event, that have been happening for almost a century.
However the OP is more concerned about being stranded, an inconvenience for most, but a dangerous condition where he is.
So the situation involves more complicated choices than simply spending a few dollars on a tire.
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