I use a simple childrens dome. I modified it myself by painting it in camoufage colours and by stitching a sleeve on the front to put the lens through and by making a few peeping holes. It is very compact, extremely light and very easy to set up. Another advantage: it costs around 20$ in a toy store. If you cut the bottom, you can walk around with it to approach your subject.
WILDEYES / ARTERRA Before You Attempt To Beat The Odds. Be Sure You Could Survive The Odds Beating You.