I never realised the Antonine Wall was so developed - I always thought it was just a small ditch and palisade.
I ended up looking on the Antonine Wall website to find out who was based there, one of my slightly more eccentric interests is researching Roman auxilia units to understand where they came from and where they were based. It seems Rough Castle was garrisoned by a unit from what is now Belgium, the Sixth Nervian Cohort.
Yes, there are a ton of forts around here. The one here in Edinburgh at Crammond was huge, and had a port to allow supplies to be shipped in.
I also find the details of who was around quite interesting. The info boards also talked about the Nervians, and they also name their commander Flavius Betto due to some of the inscribed stone work left behind. Its amazing that we know his actual name after all these years. I'm hoping to see those carvings tomorrow, because there are in the museum here in Edinburgh !
You can read a little more about them in the extra pics I've uploaded below (pics of info boards at the site).