Valleyfair reveals safety protocols for reopening - with RSVP now required Reservations for Valleyfair's 2021 season are now open. Author: After shuttering for the entire 2020 season, Valleyfair is preparing to once again opens its gates and welcome back visitors, though with a few changes. On Monday, May 3, Valleyfair began allowing hopeful parkgoers to make a reservation. That means no more buying tickets at the gate on a whim. Instead, as part of the park's "extensive coronavirus reopening plan," all visitors will be required to make a reservation in advance. When the park opens May 22 (followed by Soak City Waterpark a week later), capacity will be limited to allow for proper social distancing.