Maybe a little bit of a different story, but one time I had to go to ORD for a conference for one of my classes. I had a hard time finding someone to cover a shift for me at the beginning of the time I needed off, but my manager was gracious enough to let me work a flight and then leave on it (we only have one flight at a time, so all that was left was a few small tasks that the rest of the people working could easily do). After working the ticket counter to check everyone in, I got my backpack out of the office, went through security, and worked the gate. When I boarded everyone else, I was able to board myself and print the paperwork, which I gave to the flight attendant before taking my seat. We're small and slow enough that we usually try to clear people at the ticket counter, so I didn't clear myself or anything stupid like that. However, I'm pretty sure that I was wearing my uniform this whole time, though I had a jacket covering myself when I made it to ORD and beyond.