We are booked on a Viking cruise in Dec on the Danube river. The water levels may prevent this from happening as scheduled and paid for. What sort of hotels, restaurants and tours are provided for? Will our time be cut short at towns on itinerary or missed totally? What sort of rebate/refund will be paid? Most of us are seniors who book river cruises, bus travel is very difficult as we have to sit for hrs and lugging luggage is not fun. We cruise so we don't have to pack and unpack daily. Any thoughts?