Now that you have found the burner access port, you are probably good to go for the rest of your trip. When you get home, and have time and space, you should be able to peer into this port and see the spark when someone snaps the button inside. What you want to see is that a) the spark actually happens, and b) that the location of the spark is in the middle of the pilot flame. The igniters are pretty tough, although a bad ground is possible, as Wayne said. But is is easy for the spark electrode to get displaced just a little bit, enough that the spark doesn't encounter the gas.
Bill
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