Stopped here to sleep midway through a long drive. The main site is a large gravel lot with a vault toilet at the trailhead. We arrived after dark so it took some trial & error to find. Exit 254 off I-90 then travel east on Sprague Highway Rd E for at least 2 miles then left on Miller Ranch Rd then take the next right. About a half mile on the left will be the parking lot, trailhead & toilet. There’s other spots to camp but I think it would be hard to find them in the dark if you’ve never been before. Heard the train a few times off in the distance but it wasn’t too loud. We were the only ones there on a Monday night.