Am I Missing any Camping Essentials?

I am going camping for 5 days in the woods of Cave In Rock, Illinois at The Gathering of the Juggalos 2009, 10th annual, 5 day camp out music festival, so far I have a 12 person tent, queen size blow up mattress, propane lantern with many mantles/tanks, propane stove top w/plenty of tanks, large pocket knife, 3 24 packs of bottled water, 60 frozen hamburgers, 20 frozen chickens, large cooler and ice will be available 24/7 to keep everything cold, tons of beer and my girl, what am I missing that I will kick myself in the *** later for not having?