A tool that is highly valuable in designing Event Experiences is the Blueprint or Customer / User Journey Map. Within this tool you are creating all the touchpoint you want your participants to experience.
But the Blueprint does not need to be kept „backstage“, it can as well be used as a tool to gather feedback from your participants:
The participants of the coThinkTank on „Social Business Innovation“ were invited to give collaborative feedback on their experience on an Experience Map of the coThinkTank. The facilitators tackle Service Design invited everybody to share and exchange their individual experiences and perceptions of the event on a large paper-covered wall structured along the timeline of events. The experience map helped to understand the participants perspective, identify areas of delight, success and failure, look for improvement opportunities and get a grasp of the informal interactions taking place.