Not sure why
Not sure why anyone would want to stay here, unless you have a boat and happen to be in the neighborhood. Hot, dry, lack of shade, no WiFi, bad phone signal but having said that, your RV spot will have a great view of the lake below.
You could swim in it, not a great looking reservoir, or launch you're boat but there are so many beautiful lakes in Oregon so I'm not sure why you would pick this one.