Grim Hallow Haunt has some great pictures for inspiration. I immediately thought of his cauldron hanging from the 3 branches over a fire. But maybe a dutch oven would be more fitting in your theme than a cauldron. :)
As far as fire you can get by with a string of orange and a string of red lights under wood stacked up if you didn't want to go thru the whole hot coals diy. Just have to make sure that they are obscured enough by the...
That is fantastic Scarecrow! Ohhhhh and with some up-lighting that would create those great shadows I would think.
We used to have this old shelter belt nearby that protected a house that I could get some great fallen branches from. I called it the spookery woods and my 4 year old & I would go get them for our yard haunt. Sadly its an apartment complex now. :( Now I'm itching to get branches again...those are hard to come by in the open prairie! :)
I like 3m spray adhesive for foam insulation. I havent ever had the tip gum up. So it works well for smaller projects. Menards carries it. Works well attaching foam to itself and wood, however it will not work to fill in gaps.
What about using wire to make branches? You could braid pieces to make the thicker portions then taper down. Wrap it all in brown floral tape. As you tape you could insert fake leaves. To make them appear as they are dying hold them over a flame, the edges will curl. If you want to add hanging moss dye cheese cloth army green and cut into strips. Hang from branches or even the ceiling with tacks. It will really give you that closed in feeling.
Oriental Trading has this:
I purchased a different brand several years ago from Spilbury for around $20 if I remember correctly. I set it beside a boom box (handy that I'm old enough to have one still around lol) with the base cranked up and it does the trick just fine for my little yard display.
We use the old fashioned large blue flood lights still. Hope that helps. :)
So I have 6 Evil Mad Scientist Flickering LED light boards http://shop.evilmadscientist.com/productsmenu/792 that run off 2 AA batteries. I want to wire them to a wall wart. It seems that each battery is 1.5 volts, so what volt/ amp wall wart would I need to power all six? I'm guessing 3 volts per light kit, 18v for all 6, or run 4 off an 12v wall wart and the other 2 off 6.
After wrapping the body with cotton filler cord, yard and twine covered in monster mud the prop is almost finished
Spray painted the entire prop with dark brown spray paint
The only thing left is to dry brush the vines with a lighter color brown paint