A nice article covering many topics of Re-Opening
https://zipawaytv.com/wp-content/uploads/2020/04/Adventure-In-The-Shadow-of-COVID-19-1.pdf
This has been written by an American and therefore contains some county specific information and language. But it does cover some nice considerations for you reopening your park. As with all of these articles be aware of when they were written and that understanding of COVID-19 may have developed since it as published.