Communication Goals For Just 4 Women Expo

As part of the communications goals for all the participants of the Just 4 Women Expo, getting a good headshot and event participation shot.
Estimated 20 businesses and 50-75 attendees and 20 volunteers -
Photo Deliverables
Business Photos in front of Expo Banner
Headshots
Not sure how you can do this, but is there a quick shot method or something?
Fill in time to make sure every slot is taken
Photo Booths?
I really don't connect with them, so any thoughts?