Julia Z.
Yelp
This park is lovely, well-maintained, and full of things to do. Between the river, the forest, and the tidal mud flats, not to mention an open field or two to spot critters in and/or fly kites, you won't be bored.
The rangers are super-friendly and the facilities are clean; my family has a leave it cleaner than you find it policy and at our site, we could literally only find a handful of debris left by others for us to pick up. Say hi to Eric, who was one of the friendliest park rangers we've ever met in this state. Instead of telling our kids that they couldn't take oyster shells from the beach and leaving it at that, as a rule for them to follow, he explained that even the dead-looking shells might have teeny baby oysters attached to them, and told the kids about the different species of oysters they'd picked up (in the form of shells). He was so nice about it that they had no idea they'd just been scolded very gently AND educated at the same time!!
The park has mostly pit toilets (modern outhouses) which are fine; when it's breezy, they are well ventilated and not smelly. Showers cost a quarter for a few minutes of hot water. My only complaint is that just like all the other Washington State Parks, the toilet paper they provide is the thinnest, roughest stuff and they stock it in near-impossible dispensers... good luck getting more than three sheets at a time. You will enjoy your trip immensely if you just bring a roll or two of the good stuff from home in gallon-size Ziploc bags!!
Brinnon, the little town nearby, is both good and bad. There's a great-looking cafe (we missed dinner and had our own breakfasts, so we didn't try it) and a small-country-town dangerously-amusing country store/gas station for the necessities, but there are also houses close enough to the park that someone's barking dog was a bit of an annoyance the first night. Oh well. It does mean that if you forget hot dogs, chips, propane or ketchup, you'll be able to recover gracefully without driving a long way, and that's a plus for sure.
The platform tent was excellent, dry and clean. The beds are adequate and beat the hell out of the sleeping bag on the ground with a root in your back that make up so many of my camping memories. The picnic tables are made from Trex, and it really pleases me that they are totally on the recycling bandwagon at this park, with a big recycling center at the entrance.
Firewood and kindling are available at totally reasonable prices ($4 and $1 per bundle).