So, I edited and expanded the plot, there should now be enough room to fit the rest of the holes into this plot. See below images...
The shoreline has been expanded to allow for 2-4 more holes, depending on length/width.

Also, I carved out a new canyon going behind the main mountains that should allow for 4-6 more holes. The way the first 7 holes are looking, we'll start up that canyon for the end of the front 9 and the start of the back 9.

Also, remember, feel free to MOVE any of the trees that could be blocking your potential hole. Don't delete them please.
