In 2013, the British Ecological Society took science outreach to music festivals with activities designed to be both educational and show how ecology can be fun. See here for what they did in 2013.
This year, the BES Roadies plan to attend music festivals again and are looking for volunteers to contribute and help to develop new ideas. Anyone wishing to be involved is invited to apply to attend the training day on 13th February 2015. Further information and booking form available here.
This sounds like a great and fun opportunity for PhD students and researchers with an interest in public engagement and a passion for ecology.