do it, at least they didn't say something like "hey your pagan DRESS UP LIKE DUMBLEDORE LOLOLOL"
Yes. i would do it.
They already know what you're all about. Give them a bit of a show.
As Lucy van Pelt would say...and I quote " A person should chose a costume that contrasts their own personality" LOL!
There's some little 'niggle' there in my brain that says your cloak/robe etc...is NOT a costume. So for me personally? I'd go as Mother Teresa or...maybe Joan of Arc.
But...each to his own!