We just returned from a week-long visit. Be aware that if you've never been here before, you have to be careful not to drive past it. The sign says The Driftwood RV Resort, but you may be expecting Copalis River RV Park. Also, the sign is somewhat obscured by bushes depending on which way you are driving in from. It is across the road from Echoes of the Sea.
We reserved three spaces total for our group. One with a river view, and two in the wooded area in the back. It was a really beautiful location. We enjoyed wood fires each night. Wood can be purchased onsite, and $10 gets you a good sized bundle delivered to your site.
There is an old community building with Foosball, and a laundry. There is an old bathhouse, but also a second new building with private toilet/shower rooms.
There is even a pet bath, just be prepared as the machines had a sign that notes $10 cash.
During our visit there were eagles flying above, a deer ran through our site...and we had an unplanned visit from crows and raccoons. Do not leave any food or garbage out unattended.
I'd recommend this RV campground. There are several sites for RV and tents, the key card gate for entry adds security. I'd like to return again in the future. There are still a lot of things in the greater area I'd love to explore!