When an event is open to the public, there are a number of considerations. Some questions that need to be asked are:
What kind of vehicle will they arrive in? Van, car, bike, bus? Where are they going to park? — What kind of signage will be needed to get them to park? — What signage will be needed to get them to registration/check-in?
Audio Visual — will there be guest presenters? Are they bringing media? In what format? Laptop? Flash-drive?
Building hours and access
Staff needs and accommodation