Gateway Inn & RV Resort — Mount Rainier National Park If you’re looking to stay as close as possible to Mount Rainier National Park, Gateway Inn & RV Resort is hard to beat — you can literally see the entrance from the parking lot. It’s a simple, no-frills stay built around one major highlight: location, location, location. ​ The inn offers just a handful of RV sites (about six), along with cabins and a small motel. Sites are grassy, fairly tight, and may be tricky for larger