I've carried on a Judge and had very little problem with it, just had
to plug it in and show that it wouldn't blow up when activated.
Heck, in Nashville, we didn't even have to do that. They just
x-rayed it (the Judge was actually less of a problem than our
shoes, which had to be removed, etc.).
I think I'd prefer to carry the buzzers on so I could answer
questions, give a personal demo that they won't explode, etc. I
would second the notion that either way (carry or check) you'll
probably not encounter major delay. Especially if you don't joke
about the bomb-making potential of your system.
Mark