Annual passholder previews for May 2-5 have already sold out.
The park says it will announce its full slate of COVID-19 protocols for 2021 on April 26.
The special events will follow the park's grand reopening on April 24.
Guests can now remove masks in outdoor spaces where maintaining six feet of distance between other parties is possible.
This will be the second park purchased in the past year by Chicago businessman Gene Staples.
The dueling waterslides will first debut for passholders on April 1 and 2.
The park will be able to operate at 25% capacity thanks to the state's progress on COVID-19 vaccinations.
Both parks will open to passholders and members before welcoming the general public on April 3.