Reservation Fee (one-time, non-refundable) | $400 Grounds Rental Fee: In-season (May – November) | $2,000 per hour Off-season (November – April) | $1,000 per hour Individual event space fees: The Observation Deck | $400 (30 minute maximum) The Annex Building | $1,200 for two hours. $500 each additional hour. Exclusive use of the entire park is available. Price is dependent on season and length of event. $400 reservation fee required at time of reservation. No refunds will be given 60 days prior to event.