In the reply above, the first one "Deer Hunter" is actually a cake I did and it's super-easy!
In the center, I put two small deer that you can get at most cake decorating stores, put a black circle and lines to make it look like you're looking through a rifle scope at the deer. The rest of the cake is just stars randomly placed to look like camoflauge.
This cake was the hit of the party -- they didn't need to know how easy it was! (except for the wrist cramp from all the stars!)
Good luck with your cake!