Glad you guys like it so far.
A few things to point out...
Many of the objects in the new tabs were not used in the scenario. There's a set of 1x1 tile walls that run down the center of the tile (1/2 tile walls, but they take up the full tile due to alignment), but I found the full blocks much easier to work with.
There's also two sets of gates - one closed and one opened (allowing you to put a path down the center). The gates used in the scenario is the new custom park entrance (does not have a scrolling marquee). With some creative rock wall placement you can fill in around them... like this...
(Note: use the 1 clearance rock piece to fill in the gap at the top of the gates... which I forgot to do in the screenshot.)
The rock wall blocks have 4 unique sides to each rock block, and there are 10 blocks. If you place 1 side of the first rock, then rotate the same block a 1/4 turn and stack it on the first block you placed the next side of the rock should align to the pattern of the first. They can stack 4 high in this manner using only 1 block to achieve a smooth rock pattern. Also, the 2nd block (in order, left to right, top to bottom) should align so that the pattern creates a smooth transition from the first stack of rocks to the 2nd... like this...
Using this method using only 5 objects can cover quite a bit of area with a non-repeating pattern.
There's also 8 wedge-shaped large rock walls, 4 angled to each direction. These help cover more distance with less stacking. These were originally developed for Minas Tirith (those who are familiar with the layout of the city may be able to guess at their intended use) but I included versions for Moria to allow for faster building of large areas.
Have fun!