I didn't see the upper campground that one other reviewer mentioned. We stayed down by the lake in the spot closest to the lake and it was quite nice. The sites are on level grass, but are quite narrow, so it will feel crowded once there are lots of RVs there. We were only one of two when we stayed, so it was nice. There is only water and electric hookup, no sewer, but the bathrooms and showers were completely clean (if small). There are several hikes available straight from the campground, so you don't have to drive anywhere to see things. The world's largest Sitka Spruce is in view of the RV sites, so that's a nice touch. All in all, we enjoyed it and would definitely stay again.
Lake Crescent is stunningly beautiful and so it's worth the time to stay right on its shore when visiting. This resort was a little shabby, but nice enough to recommend because of the lake. I couldn't, for the life of me, figure out how to make reservations from their web site (it only seems to want you to reserve a room), but I knew we were off-season so I just went by when we got there and took my chances. The clerk seemed confused that I didn't have a reservation, but eventually worked it out, and then was somewhat restrictive about what sites she would put me in. That all took on a new complexion later in the afternoon, and seemed a bit silly, when we realized that we were literally the only RV guests in the entire place. Still, that's just an oddity and not really a problem. The site we did get had a view of the lake and it really was beautiful. There is a restaurant there, that we didn't use but that looked nice, and you can rent boats, kayaks or canoes to paddle on the lake (you should--it is the clearest lake you will ever see). While sitting at the edge of the lake, an otter swam up and munched on a crawfish right in front of us, so that was a real treat. The sites are your typical parking lot with about a foot of grass between each. The utilities all worked fine. It was lovely with no one else there, but will probably feel pretty crowded once full. All in all, if you can figure out how to make a reservation (which I'm sure you'll need once the season starts), this is well worth the visit.
We only stayed one night, but this seems like a park that mostly caters to seasonal customers. It is immaculately maintained and very professionally operated. While the sites are close together, as they almost always are in a commercial campground, each site is separated by a hedge and so feels private. The lake is small, but attractive, and most (perhaps all?) of the sites are right on the lake. You get an hour of free wi-fi, then pay if you want to use more than that. Fair enough, however, as with wi-fi in almost every campground, it is dramatically slow. After about 5 minutes of using it with my iPad, I gave up and tethered to my phone's LTE signal instead. All in all, it was a lovely find right in the heart of the suburbs north of Seattle. If I were looking for a base from which to visit the city, I would consider this an excellent choice.
We loved this spot. Yes, it's a big gravel parking lot, but you are right at the beach, and the view is amazing. First Beach is really beautiful, with sea stacks, rocks, and lots of dead trees (one was large enough to walk inside of). It's a really picturesque spot. It's a popular destination for seasonal surfers, and there is lots of partying, fireworks, etc. going on at night, but everyone was friendly to us, and we really enjoyed it. It's also very close to Second Beach is a must-see with some nice rock formations and a few nice hikes. (Keep track of tides, though, as there are places where you can get trapped at high tide.) To make reservations, we had to call the nearby Quileute Oceanside Resort, and that's also where we checked in. On check-in, they gave us a pass for showers at the Oceanside Resort, but we didn't use it. All the utilities worked fine. We got marginal Verizon coverage (good enough for voice, but data was slow). It's remote. The closest serious grocery is about 20 miles away in Forks (but there's a small general store at the park for basics), and gas is much more expensive here than in Forks, so I'd stock my tank and fridge before coming in. All-in-all, I would jump at the chance to stay again.