I love biker scout and the scene of endor with ewoks / AT-ST...
I really made a diorama and I think I will improve when I found more ideas.

For the background I search a picture on web and I reworked on photoshop for dimensions.
for the plants I found them in petshop.
I added others accessories like hologram of palpatine, an ocular ( han solo hoth 3.75 inches) and the ewok hidden ^^ (Return of the Jedi 3.75).

I think I will create a ground for more realistic ambience but I have no ideas.