One of the things I love about TransparencyCamp is that it is a large essentially unscheduled event. You can't plan what's going to happen when you have over 500 people and just a loose schedule of events over 2 days. The branding has to be loud enough to guide people though the unconference format in an unfamiliar space and convey a sense of excitement and energy. The implementation has to be flexible and allow for things to change, like a picnic session in the park, or food trucks for lunch parking in unexpected locations.