Yeah, the terrain could be better. It doesn't look natural. The parts holding up the gate are decent, but the mountain-side (I'm assuming that's what it is) behind your camp looks weird. There isn't a gradual increase in the angle of the mountain-side which makes it not look very realistic. The overall design on the terrain is nice though, just not the overall picture.
Other than that, I really like this. I would have made it a bit bigger, though.