We just got off the Island Princess from Hawaii. They will give you a little chart showing the location of all laundry facilities when you check in. We were on Dolphin and used the laundry room at the back of the ship on Dolphin deck. There are roughly 7 coin operated washers and driers. There are also facilities for ironing. You can get change at the purser's desk. My wife brought her own detergents. There is also a coin machine in the laundry room. Look out! It can get very busy in there. Early morning is the best.