The earlier advice on weddings shows is tried and tested, though a critical factor is in the presentation. A good sized stand and a nice backdrop, pull/pop ups, wedding cases, big screen showing your best clips and smartly dressed staff, one female always helps.
I have a shot of our stand somewhere that I'll try to find and upload for you.
It's a matter of perserverance with these shows and knowing which are the most productive stands. Attend a couple of the big shows and you'll soon spot the eye catching layouts and best locations. Hope this helps