There is potable water and non-potable rinse water available at the RV dump station. To get there, you need to travel on Highway 2 West of Spokane for 54 miles until you reach the town of Wilbur. Then, you need to turn North on Highway 21 and travel for 14 miles until you reach the Keller Ferry Campground. Make sure to follow the road signs to find the RV dump station.