The description of this campground provided in the “About this campground” is quite accurate.  From the campground you can do boat activities or hiking.  We also did a very nice long bike from the campground but for some sections of it we had to share the road with fast car traffic.  While you will need to drive there it also makes it a nice base from which you visit Grand Coulee Dam. We went there at the beginning of October and the weather was quite nice. It would probably be too hot for us during the summer.