Bigsteel-
I really think you should re-evaluate the placement of the boats at the dock. Having anything right up against the edge of the layout makes it look strange, and out of place. For boats, you need water... and lots of it, to create the effect of a real waterway being used for shipping.
Vehicles, in particular, look very out of place unless located more than their own width away from the edge. Placing them at least their length from the edge improves the effect even more.
I like what you're doing, and the rest of the plan looks preety dang good. I just don't think you'll be happy if you try to finish the dock area that way. It will be one of those areas you always looking at, trying to figure out what's not right.