Camping along US Route 2.

In the National Forests there are official campgrounds but also you can camp more or less anywhere. I know of unofficial places to camp in the Mt Baker area, such as the end of the Hannegan road off SR 542 and the Shuksan Picnic area and the nearby road  on the south side of Nooksack River on 542.

But I don't know such unofficial car camping places on or near US Route 2 in the North Cascades in the Mt Baker Snoqualimie National Forest. Can anyone suggest any?
Thanks!