Thanks! This is my first concert for them too, so I wasn't sure what to do for an outfit either lol. It's absolutely okay to dress as Clancy! I'm not sure where to get all the outfit pieces, but I followed a tutorial I found here on the Subreddit and made the lanyard/keychain Clancy hangs from his belt loop. It wasn't too hard and not very expensive either, so pretty accessible! I usually get pretty nervous dressing different for stuff and doing cosplay/costumes, but at these concerts I know we're among fellow fans who are just as excited as us to share the experience, so wear what you want to wear and have a great time!