One of my buds about an hour away just did a large show. He got a very detailed info pack of the ones that register with the show, including guest count, budget, reception hall, etc........he hadn't had to much luck the past two years on the show, just getting a few bookings to pay for his fee was about all.
This year, he selectively went thru the list and picked out the ones he wanted to target. Along with a very nice note that was short, simple and personable on a very nice wedding invitation paper stock, he included an invitation to a local high-end restaurant for a free dinner for a specific night to meet and greet and discuss their reception dreams. All they had to do was rsvp via email/phone call.
He knows his true strength is face-to-face contact. It was a risk with additional expense for him, considering it wasn't a guarantee that they would book, but he wanted to change things up from the status quo. His success rate was about 90% of the 20-25 that he targeted & met with and booked all events at a 15% increase over his current rate. His risk paid off for him, your mileage may vary.