i usually keep my pins as one of my carryons since i carry them in a pin bag i use it as my personal bag and keep my wallet and stuff in my bigger carryon bag. when I go through xray i just let them know ahead of time they will be getting a bag with lots of pins in it. I unzip the bag when i put it in the bin with the pin trading logo on the front so they can see it if they need to check itmakes it alot easier for all!!