Yes, you will be able to use your 2020 tickets during the 2021 season. However, you must respect the low and high seasons. If, for example, you have low season 2020 tickets, you can use them during the 2021 low season period. If you want to use them during the high season (from June 19, 2021 to October 11, 2021), you will have to pay the difference between the value of your ticket and the high season rate upon arrival. With 2020 tickets, reservation is not required.