That Christmas tree was genius! Seeing this build makes me want to do something on the Siearra Nevada map, which is something I never thought I'd do. May I recommend throwing a few more trees around, I don't know if this is possible (Seeing as I've barely been on the map before) But if there is a variant of placeable trees with snow on the branches you could do an all-white tree with red and green (or whatever colors you think would look best) lights.
The Sierra Nevada map has been on our list for a very long time and we are glad we finally got to use it. Thanks for your comment on the xmas tree, it was actually a test for a future concept. We will add a few more trees around, but we want to keep the sense that it is a remote place to put a park.