Depending upon time and budget let your products "hook em in" before you even start.
Treat it like a large expo.
1. Create a logo for your presentation.
2. Send out flyer,etc, to the attendees
On day of event
3. Do a quick partial wrap of a van and park it in lot where all would see
4. Use sidewalk graphics, window clings, floor graphics, carpet graphics, wall decals, sign frames, large cutout stand up, etc to display products to the attendees from time they get out of car to the room.
A little over the top but we did something similar awhile back. By time attendees were in room, all they wanted to talk about was all the cool things they had seen and how to get them.