GWM so no wild camping as a right unless permission from local tenant.
The folks in charge of protecting the wall for future generations beg people not to walk on the wall or camp within its shelter. People have been seen using pegs into the wall and even using stones to stop their tents blowing away. There are plenty of woods within easy walking distance where you can hide out for a late set up early getaway.
Ninthace the Antonine Wall was built to keep us hemmed in.
Seriously though I was at a talk in what used to be the Hancock Museum in the Toon and one of the senior Archeologists was saying that it was just a sign of strength to encourage the locals both sides to go through the permitted gates to pay duties on the goods they were carrying. So basically a Customs border rather than military. Ditto the Antonine but that didn't get the expected revenue so was abandoned. That thinking may have changed over the last 7 years.