At Gavin - yep, I was simply commenting on the LOS query.
Re the dense terrain being singled out Andy, I think the idea is that you play the normal movement rules BUT with the added restriction re Dense terrain. In your case the terrain is not dense so does not affect you (but would if you were in AFV) but the normal rules apply, so you have to stop at the edge of the terrain and gather your nerve for the next stage in the open.
Guy