James is right from a gaming aesthetics view point. Your much more on the money for realism (less than 40 degrees and they're a hindrance to defence and a leg up for attackers). Like James I'd recommended continuing with the stakes as separate elements As they're a multi functional item in therir own right and don't need to be used just with the fort. If your thinking of a vallum as well then don't for dont forget to orientate the angle of the slopes to the line of sight from the battlements .As its about the only thing that could kill such a lovely build.
The one detail I'd love to see you add is a wooden head quarters and a wooden building under construction.Those in conjunction with the tents. I think that would lift it visually to another level of story telling.
