On maps this is sometimes called Paradise Resort & RV Park, but if it's an RV Park with "paradise" in the name and you're in Castle Rock, Washington, you're in the right place.
Just off the freeway. Mostly full-timers. There's a store there with the basics, plus laundry machines, showers etc. No frills. Friendly enough staff and people who live there. Full hook-ups. Sites are nothing to write home about. They take overnight bookings for about $32 a night.
If you have kids and/or want more facilities, head across the freeway to Toutle River RV Park. Otherwise this place is fine.