Most DJ's at our bridal shows bring a small sound system and some lights.
More recently, some are NOT bringing them, as a way to appear "different" from all the others. Also, some DJ's are realizing that sound and lights at a bridal show are too distracting. It makes it harder to talk with potential clients, and in some cases, really pi**es off the people in the next booth... and they are asked to tone it down.
Best advice is to have a video of some of your events, on a TV in the booth. It offers the same effect as having a sound system and lights, but it is not as "in your face".
Also, most vendors will put their table at the front of the booth...but I've found it better to not have a "barrier" between you and the brides. Put the table on the side or in the back of the booth, and open it up so brides can "walk in" and talk to you.
I would also offer a "discount" to anyone who books you thru the show...as long as they book it within a certain amount of time.
And if it is NOT offered by the people putting on the bridal show, I would ask for a list of brides, so you can contact them afterwards.
hope it goes well!
Mike