I have shaped the hills and added planks to the inside of the moat.
I have decided to go with the square version of the bastion, as I think it fits the civil war fort theme better.
The bastion will have ar least one ramp and entrance as can be seen in the first picture. The sloping ramp matches the design of Fort Macon.
From this view you can see that the fire ports and emplaced weapons will have little field of fire until enemies make it to the wall. This is quite similar to the forts that inspired it. The main firepower will come from the roof and the forces on the outer line.
The building will get a nice cover save from most ground based fire beyon the outer wall, although aircraft will have an unobstructed view of the bastion. Of course, so will the emplaced weapons of the bastion have unobstructed views of aircaft coming in to attack.
Well, what do you think?