Here is what they said:
Following your 2-night stay in Prague, you will be welcomed on board Viking Beyla in Dresden and carry-out your shore excursion program from there. After completing your shore excursion program on Day 5, you will then transfer to identical sister ship, Viking Astrild, which will be stationed further along the river, to complete the rest of your itinerary. Day-by-day details are below.
Day 1 - 2
Itinerary as scheduled.
Following your two included hotel nights in Prague, you will travel by motor coach to Dresden (92 miles) for embarkation on Viking Beyla.
Complete your shore excursion program in Saxon Switzerland, Germany by motor coach. Return to your ship in Dresden.
Disembark from your ship in Dresden, complete your shore excursion program before transferring by motor coach to embark Viking Astrild in Wittenberg.
Day 6 - 7
Complete shore excursion program from the ship docked in Wittenberg.
Day 8 - 10
Disembark for your 2-night hotel stay in Berlin; remainder of itinerary as scheduled.
Please accept our apologies for this change so close to your departure. Rest assured, we have extensive experience in dealing with all manner of challenging conditions on the Elbe River and we will do our utmost to provide you with the same services, meals and excellent shore excursions you expected when making your booking with us.
In addition, we are continuing to monitor the situation in cooperation with German and Czech river authorities and your Program Director will update you on board should any additional changes become necessary.
Please note, in consideration of this change, we will be extending a future cruise voucher for 50% of your paid cruise fare. The voucher can be used toward any future voyage with Viking – river or ocean – and will be emailed to you separately; please allow two weeks for delivery.
Alternatively, should you wish to cancel your trip and receive a full refund.
Since we are packed and ready to go, we have chosen to cruise. I am sure Viking will do the best they can and I am certain we will be able to see everything we were promised. Hope this helps.