Their is a coin laundry apx 15 min away in a little shopping area in Cole Bay across from where the old Harley Davidson shop was. Sorry I don't know the name. But Mary's Boon does offer a next day or sometimes same day wash and fold service that their housekeepers do on property. Mary's Boon has a great staff so I am sure they will take great care of any needs you have.
There is a reasonably priced laundry service across from the Texico gas station right before the roundabout that takes you over the hill to Philipsburg.