ive never done a creamfields
but was at glastonbury and t in the park for the year of the mud
judging by how the weather has been lately u are defo in for some lurrrrrrvely sludge!
i defo advise that u take
wellies
loads of carrier bags
waterproofs
bin bags (if really muddy just cut head hole in top of it and wear like a dress!)
a sense of humour
a desire to go sliding in the mud
an urge for full on mud fights
anyhows hope u have a dirty time of it