Ooh, this is shaping up to be good! It has the AndyM: Awesomeness Guarantee...

And the theme is right up my alley too.
Have you tried typing 'archery butts' into google?
I have, the most entertaining thing I encountered was a street sign saying "Kings Butts" and this:

And here I thought you were on to something good....

I used a hairdryer to heat some GS to give a thin covering for woody texture...
What is the reason you heat the GS with a hairdryer?
Does the (over)heating cause a certain texture to occur, or does it make the GS more pliable, so you can put thinner sheets on the tree or such?
I'd like to know, as I'm looking into building a creepy haunted forest of my own, and have some trouble solving conundrum of texturing my trees.
As far as suggestions go, have you thought of:
-A(n abandoned) chapel?
-A witches' or soothsayers' hovel?
-A narrow bridge? (for the essential "You shall not pass!" or "Airspeed of a swallow" scenes...)
-A decorated pagan sacred grove?