I was driving by Hub Hobby this weekend, and decided to stop in and pick up a couple of packs of Woodland Scenics Trees, and 3 packs of foliage. A very kind Emily helped me assemble the initial 10 trees. I added 5 more on Monday, and took the pics. I'm still experimenting with how to apply the foliage. The last step will be to spray seal them as some of the clumps of foliage are not all that well secured.
Between the two packs of trees there are 120+ model. It should be enough to supply sufficient ground cover.