At OKW and SSR the laundry facilities for people staying in studios are by the pools. At BW and WL I think they are inside the villa building but don't know which floors. Can't remember about BCV because we only used 2 BR units there.
The use of the machines is free even though it looks like you need to put in coins, but you either need to bring laundry supplies or buy them from vending machine at $1 each. They had 2 kinds of detergent, bleach and softener sheets at SSR in the machines. I bring the laundry tablets from home. Can't remember but think there may have been a one use box of Tide -in the room but that may have been only in the 1BR and above.