Hi Rev:
Very nice. I have a very small park area and went very "rural," without any carnival rides, etc. I just couldn't fit them, and the wife wanted a "peaceful" park. I have attached before and after shots of the area (can you tell photography isn't a hobby of mine?) for your consideration with the idea of using some height. I took a piece of packing styrofoam (from some such thing) about 2" high and cut it down with a bread knife until I made a ridge in the back, then adorned it with trees. It help to separate the "industrial" from the "rural."
Before
After
Look forward to seeing more of your park!
Bruce