Not a campground but since it has RV parking available I figured it is worth a mention. It's halfway between Aberdeen and Westport, right on the highway. Beautiful grounds, including mini golf, "wizard chess" (large pieces, outdoor game, not actually life size but tennis court size), a maze, plants for sale, and a small but immaculately groomed dog park. Dogs welcome on leash in other outdoor areas and in the patio dining. Indoors, dining room and a very nice gift shop. (Mentioning dogs not just because I have them, but because as a traveler with dogs sometimes leaving them in the car isn't an option- for example, there is no shade for parking at the Winery.)
Wine tastings, wine available with meals. The food was great. M-Th they have $1 off drinks and appetizers from 3-5 plus several dinner specials (yes, early for some of us!) They also serve breakfast. And kid friendly. Downside- last seating at 6:30 PM so everything is early-bird-special if you are used to dining late.
https://www.westportwinery.com/
We'll go back. In fact, we plan to stop for breakfast on the way home. Being able to pull the trailer in easily is a major plus, and I want to try the Hawaiian Cinnamon Roll.