I stayed at the regular salmon la sac campground and loved the beautiful area and proximity to Seattle. The next week I went again but scouted around for dispersed (free) camping spots on this road up to the lake. There are so many of them with river access I lost count. For safety reasons me and my friend wanted one out of sight of the road, not a lot of those but we found a great one. Got chased by a female mule deer on the way to the lake and had to run back to the campsite but other than that a great trip!

Watch out though with the elevation increase it can be really cold at night.