Cool answer to a question I just got last week "How come you never have a booth?" Walking the floor to sell is easy and if you need to present then infoChachkie's advice of booking a private room at a lesser cost for an "exclusive" presentation is much smarter.
Walking the floor to sell is not easy at all and a private room offsite is a very poor substitute for a booth on the show floor. A trade show is a stag hunt--a collection of firms that get more prospect interest together than individually--you have to join the hunt by either speaking at the conference or having a booth or both to get the full value.