I travel by commercial air all of the time, and I always carry a good kit. They didn't need a road recovery kit or any heavy tools, just a map, a little shelter, signaling and water! Their critical failure was that they did not use their most important survival tool, their brain.

Your brain can get through any airport check point, and it does not cost anything more to take it with you.

With a very little preparation it can get you out of, or prevent, any such situation.

With a little water and food it can continue to function indefinitely, no need for batteries.

It can be improved and become more effective with a little proper maintenance, with very little associated cost.