For your gig, the risk assessment will focus mainly on your own gear. Make sure everything is in good condition, especially electrical equipment, with no exposed wires or faulty plugs. Be mindful of potential trip hazards from cables, and ensure they’re securely taped down or out of the way. Also, check that your equipment is stable and won’t tip over. Since it’s outdoors, you’ll want to consider weather conditions and how wind or rain could affect your gear, and maybe plan for some kind of shelter just in case.