From everything I read posted by the EAA, the newer Electric sites are the only sites that can be specifically reserved. As such, you pay from the date you reserve the site through the end of the show with no refunds available for early departure. All other sites are first come, first serve and you pay from the first arrival day through the end of the show but are eligible for a refund for early departure. Refunds are based on minimum stay of three days. So, if you only camp two nights, lets say Monday and Tuesday night and leave Wednesday before noon , you will be refunded for the remaining days, starting with Thursday night, satisfying the three day minimum stay. Hope that's clear as mud ....... ;-)
Marty