You were on the highway right-of-way, but you had to cross Ahtna land to get there.
Originally Posted by Grayling Slayer
The only easement on the north side of the bridge goes left by the dumpster and then straight to the river. It's marked by poles and signs.
So when you kept going to the left to camp on the highway right-of-way, you trespassed on Ahtna land before you got there.
Their brochure is not online as far as I can find, but their large maps are.
Here's a dinky snip of the area:
Can't tell anything from this view.
Perhaps someone can get a hold of the brochure from the Ahtna guys, scan it, and post it.