i was just at the HOB in cleveland in april when the dresden dolls played there... i got a little nervous when i was waiting in line because there are big signs by the doors that say "NO CAMERAS RECORDING VIDEO blah blah blah", and when they started letting people in the security guys were *wanding* everyone. (and there i was with a big mic stand and bag of taping gear..) but when i got up there the security dude told me to put my arms out, he wanded me, asked if i had a camera in my bag, i told him it was audio and he let me in. never even looked in my bag!
the dresden dolls are open to taping and photography and all that jazz, so i think as long as howie's people have that all set up they should let you in with it, i'd imagine.