We paid $30/night for dry camping at EAA AirVenture 2013. (Sites w/ water and elec are $55)
Paid $25/night for dry camping for the latter 3 days of EAA AirVenture 2014. There is no better place to stay for the airshow than Camp Scholler. We had the Thunderbirds roaring right over our campsite during the Sunday airshow. Most campsites are near porta potties and shower facilities. And you can't beat being around other great aviation folks and those nice Wisconsin folks. We had a couple of urgent needs and the EAA staff that assisted were real "lifesavers". Can't wait to go again.