Buttons?

[Moriarty]

This will be my FIRST Championship and the sheer amount of buttons is going to be hard to wrap my head around. At my regional, I would normally collect all of the buttons. World however, will be a new challenge. What I was wondering however was how you hold them all? Do you just have a big sheet or bag? I've seen capes as one method... What are some methods to holding all the buttons you collect?

Also: I am a volunteer. Is it alright for Volunteers to wear buttons / weird hats, or is there some dress code?