I have found that you can access the Scene view and the associated camera via the UnityEditor namespace:
Camera cam = UnityEditor.SceneView.lastActiveSceneView.camera;
// But this breaks Unity
cam.orthographic = true;
I tried to set the cam.orthographic property but when doing so, Unity3D started to issues errors to the console and I had to restart it. I am not complaining because the UnityEditor.SceneView property is an undocumented feature and therefore not meant for production use.
Nevertheless accessing the camera position should be save and you might give it a try.