That's great, BoxingUnicorn . I'm biased for vampire as both a vampire player and storyteller for the venue. We'd be happy to have you. Changeling is also an amazing venue to play in.
I'm not going to say it's not impossible- especially with obfuscate and larceny. Just a heavy long coat might look weird in 60 degrees. Temperature can range from 94 to 31, so it could be tried. As long as you are okay with having the weapon confiscated and paying a few hundred dollars for a ticket when it's discovered, as that's happened in the past. It is possible to hide smaller weapons with more ease. That happened in a past Hunter game.
Do you have any questions about the venues or the site rules?