Now almost recovered from Taunton I’ve been giving some thought to the plan of the narrow gauge module.
As you can see, it is pretty simple in design:
Really is just a couple of sidings and a bunker. One of the lines to the bunkers may well go to a fiddle yard off view, not sure yet.
The real Chilmark had a lot of natural surroundings to provide good cover, so plenty of trees and scenic items will be needed I suspect as the RAF/MOD basically let nature do as it pleased apart from on the track areas etc.