My 2015 button was/is somewhere along Spring Creek around the Benner Springs hatchery. I was trying to drum up some fish on a cold January night, with maybe a foot of snow on the ground, trying to fill in a January nightfishing catch (still 0-fer, for January, February and March in that category). Even thought the air temp was below freezing, I was hoping the slightly warmer spring influenced water would make a trout move if they saw some food at night. But the only thing memorable was during the outing, I realized my button wasn't on my fishing pack anymore. I retraced some of my steps but never found it. No warden checked me that night, so I guess I got away with fishing without a license for a bit.
I bought a ten-year license in 2017, along with the hard card, and haven't bought a button for the past 4 or 5 years.