Thanks for allow the information.
My wife and I are thinking about the doing the same, taking the FCC and a low water voucher from 2018 and using it in July 2022 since my wife is a teacher. Many unknowns but our one experience with Viking river cruise (Grand European in 2018) was very good. We alternate between land adventures and cruises and had planned to go to Alaska this summer with Viking but this trip has been overcome by events.
We are also looking into the pre excursion to the Peruvian Amazon. Any thoughts on this?