Risk Assessment
Risk Assessments are a legal requirement, and will be the first thing your insurance provider will ask for should something occur. If you cannot provide one, it is unlikely that you will be covered.
A Risk Assessment covers you from the moment you arrive on-site during build, details your activities during open days, and sees you out through breakdown, and shows that you have considered risks not just to yourself, but to your staff, your contractors, visitors - anyone that will interact with your stand in any way.
The aim of a Risk Assessment is to demonstrate that you have taken due consideration to minimize all risks to your time on-site.