I can try to grab a Carcosa expansion for you if they're selling it and I'm allowed to buy more than one. As a British person the queuing is just an added side benefit to me.
The event tickets are just for a special scenario "Labyrinths of Lunacy" (that will presumably be released later as normal) so you just need to turn up for the event, no queuing required. You get a copy of the scenario too as part of the ticket price! "One of us, one of us..."