We are on that ship for an Iceland cruise (8 days). I also read about the cost of laundry. I am bringing a pair of suction cups and a length of nylon rope to make a clothesline of sorts in the shower/bath, and plan to hand wash underwear a couple of times.
Comments
"Valet laundry and dry-cleaning services are available for a fee at the hotels. Onboard, valet laundry and pressing services are available for a fee."
Based on Tauck hotel and river cruise experience, it won't be cheap (e.g. 6 euros for a pair of slacks).